Answer:
the price of each CD before tax is $10.70
Step-by-step explanation:
We can start by using algebra to set up an equation to represent the situation. Let x be the price of each CD before tax.
We know that:
The total price of the CDs before tax is 2x (because he bought 2 CDs that were the same price)
The total price of the CDs including tax is $23.80 (because that's what he paid)
The amount of tax is $2.40 (because that's what is stated in the problem)
So we can set up the equation as:
2x + 2.40 = 23.80
To find the price of each CD before tax, we can subtract the amount of tax from both sides of the equation:
2x = 21.40
And then divide both sides by 2:
x = 10.70
So the price of each CD before tax is $10.70
Which are correct representations of the inequality –3(2x – 5) < 5(2 – x)? Select two options. x < 5 –6x – 5 < 10 – x –6x + 15 < 10 – 5x A number line from negative 3 to 3 in increments of 1. An open circle is at 5 and a bold line starts at 5 and is pointing to the right. A number line from negative 3 to 3 in increments of 1. An open circle is at negative 5 and a bold line starts at negative 5 and is pointing to the left.
An open circle is at 5 and a bold line starts at 5 and is pointing to the right. Therefore, option B is the correct answer.
What are inequalities?Inequalities are the mathematical expressions in which both sides are not equal. In inequality, unlike in equations, we compare two values. The equal sign in between is replaced by less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.
The given inequality is -3(2x - 5) < 5(2 - x).
Here, -6x+15<10-5x
Add 5x on both the sides of an inequality, we get
-x+15<10
Subtract 15 on both the sides of an inequality, we get
-x<10-15
-x<-5
Multiply -1 on both the sides of an inequality, we get
x>5
Therefore, option B is the correct answer.
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FIELD TRIP A school is planning a field trip to a museum. Tickets cost $4 for students and $8 for adult chaperones. There must be at least 1 adult chaperone for every 9 students and no more than 1 adult Up to 100 people may go on the field trip. chaperone for every 4 students. What is the maximum total cost for tickets?
Answer:
The maximum total cost for tickets is $320 + $160 = $480.
Step-by-step explanation:
The maximum number of people that can go on the field trip is 100, so the maximum number of students is 100 - (100/5) = 80 students.
The maximum number of adult chaperones is 1 adult chaperone for every 4 students, so the maximum number of chaperones is 80/4 = 20 chaperones.
The total cost for student tickets is $4 x 80 = $320.
The total cost for adult chaperone tickets is $8 x 20 = $160.
The maximum total cost for tickets is $320 + $160 = $480.
Answer:
the maximum amount for the equation is 320+160=480
A net of a rectangular pyramid is shown. The rectangular base has length 25 ft and width 22 ft. The net of the pyramid has length 74.8 ft and width 70.4 ft. Find the surface area of the pyramid.
The surface area of the pyramid is 5,685 ft².
Solving for the surface area of the pyramid:To find the surface area of the pyramid, we need to find the area of the base and the area of the four triangular faces. Since the base is a rectangle, we can find its area by multiplying the length and width:
length, l = 25 ft
width,w = 22 ft
Area = l x w
Area = 25 ft x 22 ft
Area = 550 ft².
To find the area of each triangular face, we first need to find the slant height of the pyramid, which can be found by using the Pythagorean theorem on the net dimensions. The slant height is the square root of
Net dimensions of the pyramid:
length, l = 74.8 ft
width, w = 70.4 ft
h = [tex]\sqrt{l ^{2} +w^{2} }[/tex]
h = [tex]\sqrt{(74.8^{2} + 70.4^{2} ) }[/tex]
h = 102.7 ft.
Now, we can use the formula for the area of a triangle:
Area = (1/2) x base x height,
where,
base,b = the length of the rectangular base (25 ft)
height = the slant height (102.7 ft).
So, the area of each triangular face is:
A = (1/2) x 25 ft x 102.7 ft
A = 1283.75 ft².
Since there are four triangular faces, the total area of all the triangular faces is:
A= 4 x 1283.75 ft²
A = 5,135 ft².
To find the surface area of the pyramid, we add the area of the base to the area of the triangular faces:
SA= 550 ft² + 5,135 ft² = 5,685 ft².
Hence, the surface area of the pyramid is 5,685 ft².
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I need help this is due tomorrow!
Used the distributive property a(b+c)=ab+ac, the value of x is x>1/2
Solving inequality using distribution property includes change of inequality signs when multiplied or divided by negative number but, not in the equation.
What is inequality?
An inequality in mathematics depicts the connection between two values in an algebraic statement that are not equal. One of the two variables on the two sides of the inequality may be greater than, greater than or equal to, less than, or less than or equal to another value, according to inequality signals.
Curran:
-4(x-6)< 22
Used the distributive property a(b+c)=ab+ac
-4x+24<22
Then subtracted 24 from bot the sides
-4x<22-24
-4x< -2
Divide both sides by -4 ( inequality changes because of dividing by negative number)
x>1/2
Anjani:
-4(x-6)< 22
Divide both sides by -4
x-6> -22/4
add 6 on both sides
x> -22/4 + 6
x> -11/2 + 6
x> 1/2
Solving inequality using distribution property includes change of inequality signs when multiplied or divided by negative number but, not in the equation.
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– 0.2× – 5÷( – 1– – 0.5)
Answer:
Step-by-step explanation:
35
The solution to an inequality is graphed on the number
ne.
-5 -4 -3 -2 -1 0 1 2 3 4 5
Mark this and return
What is another way to represent this solution set?
{xx<4.5}
Ox|x≤4.5}
Oxx> 4.5)
O{x|x24.5)
Save and Exit
Next
The solution set to the inequality as represented in another way is {x | x ∈ ≤ 4.5}. The second option is correct from the photo.
Representation of sets into a set builder notation:The set builder form is the representation of components of a set by a statement or an expression. The represented element(s) will be written using a variable, accompanied by a vertical line or colon, then the general attribute of the same represented element. This approach avoids listing the elements as seen in the roster method or the listing method.
From the given sets in roster form:
{-5,-4, -3, -2, -1, 0, 1, 2, 3, 4.5}
The same set above can be denoted by x, where x represents all the elements in the set and can be written as:
= {x | x ∈ ≤ 4.5}
This is read as x is an element of x such that x represent all the values from negative infinity to 4.5.
Therefore, we can conclude that the second option is correct from the photo.
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You know your cousin's phone number is
8675309, so you dial that number to call
him. Is person being called a function of phone
number dialed?
Function? Explain.
The person being called is a function of the phone number, as for each phone number, there is only one person associated with the number.
When does a relation represents a function?A relation represents a function when each input value is mapped to a single output value.
The input and output variables for this problem are given as follows:
Input: phone number.Output: person.Each phone number is mapped to a single person, meaning that the relation is in fact a function.
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If I Got 7 "(tokens or whatever you prefer) a minute for 9 hours/ 540 minutes, how many tokens would I have
39:11
Heights of four-year-olds are Normally distributed, with a mean of 40 inches and a standard deviation of 3 inches. At
his four-year checkup, Marlon's height is measured as taller than 70% of boys his age. How tall is Marlon?
Find the z-table here.
SECCO
38. 4 inches
41. 6 inches
42. 5 inches
43. 8 inches
Marlon's height is 42.52 inches.
Since the heights of four-year-old's are normally distributed with a mean of 40 inches and a standard deviation of 3 inches, we can use the z-score formula to find Marlon's height.
z = (x - mean) / standard deviation
where x is Marlon's height, mean is the population mean of 40 inches, and standard deviation is the population standard deviation of 3 inches.
We know that Marlon's height is taller than 70% of boys his age, so we can find his z-score using the cumulative standard normal distribution table, which tells us the proportion of the population that is less than a given value.
A z-score of 0.84 corresponds to a cumulative probability of 0.70.
So we can substitute this value into the z-score formula:
0.84 = (x - 40) / 3
Solving for x, we get:
x = 40 + (3 * 0.84) = 40 + 2.52 = 42.52 inches
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An acute angle, θ, is in a right triangle such that sin of theta is equal to 2/5. What is the value of cot θ?
Answer:
cotθ=√21/2
Step-by-step explanation:
we have,
sinθ= 2/5= perpendicular/hypotenuse
here,
perpendicular=2
hypotenuse = 5
Now using Pythagorean theorem,
h^2 = p^2+ b^2
(5)^2 = 2^2 +b^2
b= √21
so,
cotθ= base/perpendicular = √21 /2
Hope you like the explanation.
If the quotient of three times a number and five is increased by
four, the result is no more than 34.
Answer: We can start by using algebra to represent the given information. Let's call the number we're trying to find "x".
We know that:
quotient = (3x)/5
quotient + 4 <= 34
We can simplify the first equation:
(3x)/5 + 4 <= 34
We can then solve this inequality for x:
(3x)/5 + 4 <= 34
3x/5 <= 30
3x <= 150
x <= 50
So the quotient of three times a number and five is no more than 34 if that number is less than or equal to 50.
Step-by-step explanation:
Find the lateral area for the prism.
36 in 2
54 in 2
27 in 2
81 in 2
The lateral area for the prism is equal to 54 square inches. (Correct choice: B)
How to determine the lateral area of the prism
Herein we have the case of a prism with five faces, two triangles and three rectangles. The lateral area for the prism is the sume of the areas of the three rectangular faces, whose formula is described below:
Rectangle
A = w · l
Where:
l - Length of the rectangle, in inches.w - Width, in inches.A - Area, in square inches.Finally, we proceed to determine the lateral area of the prism:
A = 3 · (3 in) · (6 in)
A = 54 in²
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You are ask to solve 12x-18 =126
a tank holds 4000 liters of water in which 100 grams of salt have been dissolved. saltwater with a concentration of 1 grams/liter is pumped in at 10 liters/minute and the well mixed saltwater solution is pumped out at the same rate. write initial the value problem for:
The mass of salt in the tank at time t.
dS/dt = 10 - S/400
S(0) = 100 grams
The solution is S(t) = 4000 - 3900[tex]e^{\frac{-t}{400}}[/tex]
A tank holds water V(0) = 4000 liters in which salt S(0) = 100 grams.
So dS/dt = S(in) - S(out)
S(in) = 1 × 10 = 10 gram/liters
S(out) = S/V × 10 = 10S/V gram/liters
V = V(0) + q(in) - q(out)
V = 4000 + 10t - 10t
V = 4000 liters
dS/dt = 10 - 10S/V
dS/dt = 10 - 10S/4000
dS/dt = 10 - S/400
Now given; S(0) = 100.
Here, p(t) = 1/400, q(t) = 10
[tex]\int p(t)dt = \int\frac{1}{400}dt[/tex][tex]\int p(t)dt = \frac{1}{400}t[/tex]
[tex]\mu=e^{\int p(t)dt}[/tex]
[tex]\mu=e^{\frac{t}{400}}[/tex]
So, S(t) = [tex]\frac{\int\mu q(t)dt+C}{\mu}[/tex]
S(t) = [tex]\frac{\int e^{\frac{t}{400}} \cdot10dt+C}{e^{\frac{t}{400}}}[/tex]
S(t) = [tex]e^{\frac{-t}{400}} \left({\int e^{\frac{t}{400}} \cdot10dt+C}\right)[/tex]
S(t) = [tex]e^{\frac{-t}{400}} \left({10\times\frac{e^{\frac{t}{400}}}{1/400} +C}\right)[/tex]
S(t) = [tex]e^{\frac{-t}{400}} \left({4000\times{e^{\frac{t}{400}} +C}\right)[/tex]
Now solving the bracket
S(t) = 4000 + [tex]e^{\frac{-t}{400}}[/tex]C.....(1)
At S(0) = 100
100 = 4000 + [tex]e^{\frac{-0}{400}}[/tex] C
100 = 4000 + [tex]e^{0}[/tex] C
100 = 4000 + C
Subtract 4000 on both side, we get
C = -3900
Now S(t) = 4000 - 3900[tex]e^{\frac{-t}{400}}[/tex]
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The complete question is:
A tank holds 4000 liters of water in which 100 grams of salt have been dissolved. Saltwater with a concentration of 1 grams/liter is pumped in at 10 liters/minute and the well mixed saltwater solution is pumped out at the same rate. Write initial the value problem for:
The mass of salt in the tank at time t.
dS/dt =
S(0) =
The solution is S(t) =
FInd the simple interest earned on a deposit of $2800 after 5 years at a 2% annual rate.
The simple interest earned on a deposit of $2800 after 5 years at a 2% annual rate is $280.
What is simple interest?It is the interest calculated on the principal at a given rate for a time period.
We have,
P = $2800
T = 5 years
R = 2%
Now,
The formula for simple interest.
SI = PRT/100
Now,
SI = (2800 x 2 x 5) / 100
SI = 28 x 10
SI = $280
Thus,
Simple interest is $280.
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make x the subject for 8x+7=2y-1
Another submarine’s descent can be represented as y=-3100xy=−3100x , where y is the elevation and x is time in hours. How long will it take this submarine to make the descent? Explain in detail how you found your answer in Part C
The time taken by the submarine to make the descent when the equation of descent is given is 0.677 hours.
Submarine's descent can be represented by the equation, y = -3100 x
where,
y is elevation
x is time in hours
We need to determine how long it will take this submarine to travel 2,100 feet below the surface of the ocean.
Since the submarine to make the descent to the seafloor 2,100 feet below the surface
So, y = - 2100
y = - 3100x gives
- 2100 = - -3100 x
Divide both sides by -3100,
x = 2100/3100 = 0.677 hours
As a result, the submarine will need 0.677 hours to complete the descent.
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In a survey, a group of students were asked to name their favorite world language class. There were 25 students who chose "other" languages. How many students participated? french:42. 5% spanish:45 students participated
Spanish 45 and french 42.5. When attempting to solve a Venn diagram with three circles, it is best to start by entering the number of items that the three sets of data have in common.
When attempting to solve a Venn diagram with three circles, it is best to start by entering the number of items that the three sets of data have in common. After that, input how many items are still there in each pair of sets' overlapping zone.
The quantity of each set's leftover pieces should be entered. Lastly, locate any missing numbers using any known totals.
Using a Venn diagram to determine probabilities: The Venn diagram's subset's components should be identified. Figure out the subset's frequency. Work out the larger set's overall frequency.
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Which equation can be used to describe the relationship between x and y in the table below?
Answer: i think y = x + 5
Step-by-step explanation:
How many teaspoons are there in 6 milliliters?
Answer:
70
Step-by-step explanation:
you divide the intergert and div8de its easy
Answer: 70
Step-by-step explanation:
Please help me!!! Sorry about small photo!
Answer:
I think 9/10 but I am not sure
In 2012, it was estimated that the number of U. S. Households that had dogs as pets was [tex]4. 33 x 10^7[/tex], and the average number of dogs per household was 1. 6. Based on the information, approximately how many dogs were household pets in the U. S. In 2012, in scientific notation?
[tex]2. 71 x 10^7[/tex]
[tex]3. 70 x 10^8[/tex]
[tex]5. 33 x 10^8[/tex]
[tex]6. 93 x 10^7[/tex]
6.93 × 10⁷ dogs were household pets in the U. S. In 2012.
To find the total number of dogs as household pets in the U.S. in 2012, we need to multiply the number of households by the average number of dogs per household.
Number of households = 4.33 × 10⁷
The average number of dogs per household = 1.6
Total number of dogs = (4.33 x 10⁷) × (1.6) = 6.93 × 10⁷
Therefore, approximately 6.93 × 10⁷ dogs were household pets in the U.S. in 2012.
Hence, the correct answer is D.
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mentum.com
Lxpre3310113, 1931
ial Expressions: Mastery Test
5
Drag each tile to the correct box.
Using the order of operations, what are the steps for solving this expression?
40+8+32+(15-7) × 2
Arrange the steps in the order in which they are performed.
3²
5+9
40+8
14+ 16
8x2
KNOW
15-7
The order in which they performed be
14 + 16 . . . . add 5 + 9
30 . . . . . . . add 14 + 16
What is meant by expression?A mathematical expression is a phrase that has a minimum of two numbers or variables and at least one mathematical operation. There are four possible math operations here: addition, subtraction, multiplication, and division.
Given: 40/8 + 3² + (15 - 7) × 2
The order of operations instructs you to begin by assessing parenthesized expressions. This is done by deducting 7 from 15.
40/8 + 3² + 8 × 2 . . . . (15 - 7) = 8
Then you evaluate exponential terms.
40/8 + 9 + 8 × 2 . . . . . 3² = 9
Next, multiply and divide from left to right. In this case, division comes before multiplication.
5 + 9 + 8 × 2 . . . . . divide 40/8 = 5
5 + 9 +16 . . . . . . multiply 8 × 2 = 16
The order in which they performed be
14 + 16 . . . . add 5 + 9
30 . . . . . . . add 14 + 16
The complete question is:
Using the order of operations, what are the steps for solving this expression?
40/8+3^2+(15-7)*2
Arrange the steps in the order in which they are performed.
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Gloria mows her lawn every 12 days and washes
her windows every 20 days. She mowed her lawn
and washed her windows today.
How many days from now will it be until she next
mows her lawn and washes her windows on the
same day?
The number of days before she mows the lawn and washes her window on the same day is 60 days.
How many days before she mows her lawn and waters the plant on the same day?The day she would mow the lawn and wash her window on the same day would be the least common multiple of 12 and 20.
A multiple of a number is the product of an integer and that number. A common multiple is a multiple that two or more numbers share. The least common multiple is the smallest multiple that two or more numbers share.
Multiple of 12 = 12, 24, 36, 48, 60, 72, 84, 96, 120
Multiple of 20 = 20, 40, 60, 80, 100, 120, 140, 160, 180, 200
Least common multiple = 60
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In a group of 60 tudent, 25 play table tenni, 16 do wimming and 22 play cricket, 8 play table tenni and do wimming, 6 play cricket and do wimming, 5 play table tenni and cricket, and 12 tudent do not play any of thee game
12 students do not play any of the games. Number of students who do not play any of the games = 60 - 82 = 12
A group of 60 students, 25 play table tennis, 16 do swimming and 22 play cricket, 8 play table tennis and do swimming, 6 play cricket and do swimming, 5 play table tennis and cricket.
25 play table tennis
16 do swimming
22 play cricket
8 play table tennis and do swimming
6 play cricket and do swimming
5 play table tennis and cricket
Find the number of students who do not play any of the games
Total number of students = 60
Number of students who play any of the games = 25 + 16 + 22 + 8 + 6 + 5 = 82
Number of students who do not play any of the games = 60 - 82 = 12
12 students do not play any of the games.
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Tyson must complete 30 hours of community service. She does 2 hours each day. Write a liner equation to represent the hours Tyson has left after x days?
Tyson has (30-2x) hours left after x days .
Linear equation: What is it?A linear equation has the slope-intercept form y = mx + b. Variables in the equation are x and y. When x is 0, the integers m and b provide the line's slope (m) and the value of y. (b).
A first-degree polynomial is described as the sum of a collection of terms, each of which is the product of a constant and the first power of a variable in a linear equation.
She works out for two hours per day for a total of x days.
She has thus worked for two hours.
She has 30 hours left to accomplish, of which she has already worked for two of them.
She now has 30 2 hours to finish the task.
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how to find
127.98+35.261
(for my cuz)
The simplification of the given expression after addition would be = 163.241.
What is addition?Addition is the combination of two or more given values and it's one of the major arithmetic operations in mathematics.
The given expression is a s follows;
127.98+35.261 = 163.241
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be sure to answer all parts. a small hole in the wing of a space shuttle requires a 21.9 cm2 patch. (a) what is the patch's area in square kilometers (km2)? enter your answer in scientific notation. (b) if the patching material costs nasa $3.91/in2, what is the cost of the patch to the nearest cent?
(a) The area of the space shuttle is:2.07x10⁻⁹km²
(b) $11.0321 is the cost of the patch.
Area of the patch of the space shuttle = 21.9cm²
a) 1 cm=0.00001 km
1cm²=(0.00001 km)²=10⁻¹⁰km²
21.9cm²=21.9x10⁻¹⁰km²=21.9x10⁻⁹km²
the patch's area =21.9x10⁻⁹km²
b) 1 cm = 0.393701 inch
1cm²=0.1550inch²
21.9cm²=21.9x0.1550inch²=3.3945inch²
The cost of patching area = 3.3945inch²
The cost of patching is are: 3.3945inch²
3.25inch²x3.3945inch²=11.0321
the cost of the patch to the nearest cent=11.0321
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Clare describes her morning at school yesterday: “ I entered the school on the first floor . Then walked up to the third floor floor and stayed for my class for an hour afterwards, I had an hour long class in the basement, and after I went back to the ground level and sat outside to eat my lunch “. Sketch a possible graph of her height from the ground floor as a function of time
The Centers for Disease Control and Prevention (CDC) states that the average height for men and women in the United States is around 5 feet, 9 inches and 5 feet, 4 inches, respectively.
What height do you think is normal?The Centers for Disease Control and Prevention (CDC) states that the average height for men and women in the United States is around 5 feet, 9 inches and 5 feet, 4 inches, respectively.14-year-old boys typically stand 162.4 cm (5 ft 3 in) tall, compared to 159.8 cm for girls (5 ft 2). At this age, you should expect a sizable range in height. Puberty, however, will vary from person to person; some may have already passed through it, while others may not.The Centers for Disease Control and Prevention (CDC) states that the average height for men and women in the United States is around 5 feet, 9 inches and 5 feet, 4 inches, respectively.To learn more about height refer to:
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A shipping container is in the form of a right rectangular prism, with
dimensions of 20 ft by 8 ft by 8 ft 9 in. How many cubic feet of shipped goods
would it hold when it's a quarter full? Round your answer to the nearest tenth
if necessary.
When it's a quarter full, the shipping container holds a volume of 350 cubic feet.
How many cubic feet of shipped goods would it hold when it's a quarter full?Bassically, we want to find one quarter (1/4) of the volume of the rectangular prims.
The dimensions are 20ft by 8ft by (8ft + 9in)
Let's rewrite that last part only using feet.
Remember that 12 in = 1ft
Then:
9 in = (9/12)ft = 0.75 ft
Then we can rewrite the dimensions as:
20ft by 8ft by 8.75 ft
The volume is the product between these numbers, and we want one fourt of the volume, so we need to find:
V = (1/4)*(20ft)*(8 ft)*(8 .75 ft) = 350ft³
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