Answer:
1/4 chance for Ephraim and 1/2 chance for Keiko
If 385 of the people are students, what
percentage of the people at the school
carnival are students?
Answer:
Please tell me the total of students?
Step-by-step explanation:
Answer:
70% of the people at the carnival are students.
Step-by-step explanation:
Since the total is 550:
To find the percentage, we need to divide the amount of students by the total:
385/550=0.7
Then multiply the quotient by 100 and you have the percentage!
0.7*100=70
Anyone have the answer for this, please
Answer:
130°
Step-by-step explanation:
∠AOB + ∠BOC + ∠COD = 180
Note ∠BOC = 90°
so 3x - 28 + 90 + 66 - x = 180
2x + 128 = 180
2x = 180 - 128 = 52
x = 52/2 = 26
Note ∠EOD = ∠BOA = 3x - 28 = 3*26 - 28 = 50
∠AOE + ∠EOD = 180°
so
∠AOE + 50 = 180
∠AOE = 180 - 50 = 130°
If you improve your credit score to good and paid $1500 on your $12,465 purchase how much interest could you save in the first month?
Answer:
Step-by-step explanation:
The amount your credit score improves depends a lot on how high your utilization was in the first place. If you're already close to maxing out your credit cards, your credit score could jump 10 points or more when you pay off credit card balances completely.
22lb=________oz
22lb is how many oz
Answer:
352 oz
Step-by-step explanation:
16 oz in a pound
16x22 = 352
Answer:
352.
Step-by-step explanation:
One lb is 16 oz. 22x16 is 352
Find the interquartile range of the following data set.
3, 9, 12, 4, 6, 40, 25, 14, 10
For which value of x is the
relation not a function?
{(3, 1), (x, 0),(9,5),(12, 6)}
A) 1. B)3
C) 8. D)6
Answer:
B
Step-by-step explanation:
One input must have one output.
If x were to be 3, then there would be two inputs for 3, and there should only be one.
Therefore, the answer is B.
angles s and t are vertical angles if angle a has a measure of x-2 and angle t has a measure of 40 what's the value of x
Answer:
21 is the correct answer kids.so do it ok bye
A prism is completely filled with 80 cubes that have an edge length of 1/2cm
What is the volume of the prism?
Enter your answer in the box.
The volume of the prism that is completely filled by 80 cubes of edge length 1/2 cm is 10 cm³.
What is a prism?To calculate the volume of the prism, we use the formula below.
Formula:
V = 80l³............. Equation 1Where:
V = Volume of the prisml = length of the cubeFrom the question,
Given:
l = 1/2 cmSubstitute these values into equation 1
V = 80(1/2)³V = 80(1/8)V = 10 cm³Hence, The volume of the prism is 10 cm³.
Learn more about prism here: https://brainly.com/question/23963432
Joaquin makes $900 a week. A raise of $36 a week represents what percent of his salary?
Answer:
4%
Step-by-step explanation:
1% of 900: 9
9 * 4 = 36
Please help math questions
put number with answers please
Answer:
See below for answers
Step-by-step explanation:
Problem 1
[tex]\frac{1}{sin\theta}=2cos\theta\: ; \: 0\leq\theta < 2\pi\\\\1=2sin\theta cos\theta\\\\1=sin2\theta\\\\\frac{\pi}{2}+2\pi n=2\theta\\ \\\frac{\pi}{4}+\pi n=\theta\\ \\\theta=\bigr\{\frac{\pi}{4},\frac{3\pi}{4},\frac{5\pi}{4},\frac{7\pi}{4}\bigr\}[/tex]
Therefore, the second option is correct.
Problem 2
[tex]cos(2x)+1=sin(x)+2\:;\: 0\leq x < 2\pi\\\\1-2sin^2x+1=sin(x)+2\\\\-2sin^2x=sin(x)\\\\0=2sin^2x+sinx\\\\0=sinx(2sinx+1)[/tex]
[tex]0=sinx\\\\x=\pi n\\\\x=0,\pi[/tex]
[tex]0=2sinx+1\\\\-1=2sinx\\\\-\frac{1}{2}=sinx\\ \\x=\frac{7\pi}{6}+2\pi n,\frac{11\pi}{6}+2\pi n\\\\x=\frac{7\pi}{6},\frac{11\pi}{6}[/tex]
Therefore, the solution set is [tex]x=\bigr\{0,\pi,\frac{7\pi}{6},\frac{11\pi}{6}\bigr\}[/tex], making the second option correct.
Problem 3
[tex]2cos^2x=-cosx\: ;\: 0^\circ\leq x < 360^\circ\\\\2cos^2x+cosx=0\\\\cosx(2cosx+1)=0[/tex]
[tex]cosx=0\\\\x=\frac{\pi}{2}+\pi n\\ \\x=90^\circ+180n^\circ\\\\x=90^\circ,270^\circ[/tex]
[tex]2cosx+1=0\\\\2cosx=-1\\\\cosx=-\frac{1}{2}\\\\x=\frac{2\pi}{3}+2\pi n,\frac{4\pi}{3}+2\pi n\\ \\x=120^\circ+360n^\circ,240^\circ+360n^\circ\\\\x=120^\circ,240^\circ[/tex]
Therefore, the solution set is [tex]x=\bigr\{90^\circ,120^\circ,240^\circ,270^\circ\bigr\}[/tex], making the fourth option correct
Make sure to show your work when answering the question. Product A is an 8-ounce (oz) bottle of cough medication that sells for $1.36. Product B is a 16-ounce (oz) bottle of cough medication that costs $3.20. Which product has the lower unit price?
The Schrader family spends $600 per month on groceries for their family. If this is 15% of their monthly budget, then what is their monthly budget?
Answer:
$4000 Is the Schrader family monthly budget
Step-by-step explanation:
Take $600 and DIVIDE it by .15 to get $4000
Rectangle WXYZ is dilated with center (0, 0) and scale factor 2. What are the final coordinates?
Remember to find the coordinates of the original rectangle in the grid and then multiply by scale factor.
Answer:
B W(2,-4),X(6,-4)Y(6-10),Z(2,-10)
Step-by-step explanation:
i think dont get ur hopes ^
Oscar wants to fill a box with sand. Each bag of sand has a volume of 36 inches cubed. The base
area of the box is 54 inches squared. The height of the box is 13 inches. What is the volume of
the box? Does he have enough sand? If not, how many more bags does he need?
What is the area of the box?
B * H = A
54 in² * 13 in = A
702 in³ = A
The area of the box is 702 in³
Does he have enough sand?
If not, how many more bags does he need?
I am not sure how many bags he does have, so I cannot answer these two questions. I can, however, tell you how many bags he will need.
702 in³ / 36 in³ = 19.5 bags
He most likely will not have half a bag, so he will need 20 bags in total.
Please answer!! Will mark BRAINLIEST
Answer:
KJL=80⁰NJM=25⁰MJL=75⁰Step-by-step explanation:
(3x+5)+75+x=180⁰
3x+5+75+x=180
4x=180-80=100
x=100/4=25⁰
What is distance between point X and point Y?
O 11
O 22
O 61
O 72
(the answer is 61)
Answer:
61
Step-by-step explanation:
what will happen to the measures central tendacy is the outliner is removed 4,5,5,6,7,8,17
When the central tendency is the outliner is removed , the mean will increase.
How does outliers affect the central tendency?Outliers are often used to measure central tendency and dispersion. They can give wrong impressions of a data set when a the set has more than one or one outliers.
An outlier is known to be the value that is said to be greater than or say less than most of the other values found in a data set.
see options below
A.They will not change.
B.The mode will change.
C.The mean will decrease.
D.The mean will increase.
Learn more about central tendency from
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Find the volume of the sphere (will mark brainiest)
Answer:
(1/6)π = 0.524
Step-by-step explanation:
Volume of Sphere = [tex]\frac{4}{3} *\pi *r^{3}[/tex]
Volume of Sphere = [tex]\frac{4}{3} *\pi *0.5^{3}=\frac{1}{6} \pi[/tex]
Answer:
V = (1/6)π
Step-by-step explanation:
Use the sphere volume formula:
V = (4/3)(π)(r^3)
V = (4/3)(π)(1/2)^3
V = (4/3)(π)(1/8)
V = (4/24)π
V = (1/6)π
? Divided by 2/3 = 3/4
Answer:
The answer is 1/2
Step-by-step explanation:
to find the answer you can multiply the to given fractions.
Hope that helps!
HELP PLS.
A textbook store sold a combined total of 370 math and chemistry textbooks in a week. The number of chemistry textbooks sold was 52 less than the number of math textbooks sold. How many textbooks of each type were sold?
NUMBER OF MATH TEXTBOOKS SOLD:
NUMBER OF CHEMISTRY BOOKS SOLD:
Answer:
number of math textbooks sold: 211
number of chemistry textbooks sold: 159
Step-by-step explanation:
let [tex]x[/tex] be the number of math textbooks sold
let [tex]y[/tex] be the number of chemistry textbooks sold
[tex]y=x-52[/tex]
[tex]y+52=x[/tex]
[tex]x+y=370[/tex]
[tex]y+52+y=370[/tex]
[tex]2y=318[/tex]
[tex]y=159[/tex]
[tex]x=159+52[/tex]
[tex]x=211[/tex]
A diver is standing on a platform 24 ft above a pool. He jumps from the platform with an initial
upward velocity of 8 ft/s. Using the formula, h(t) = -16t2 + vt + s, where h is his height
above the water, t is the time, v is his starting upward velocity, and s is his starting height.
A) After how long will the diver reach its maximum height?
B) What is the maximum height the diver will reach?
GIVEN ↷
h(t) = -16t² + vt + swhere,
h⤿ Height ⤏0
t ⤿ time⤏?
v⤿initial velocity⤏8ft/s
s⤿initial height⤏24ft
TO FIND ↷
The maximum heightTime taken to reach the maximum heightSOLUTION ↷
we know that,
-16t² + vt + s = h(t)-16t² + 8t + 24 = 0To factorise the equation, we'll divide the both side by 8 and multiply by -1
we get,
2t² -t -3 = 02t² +2t -3t -3 = 02t(t+1) -3(t+1) = 0(2t-3)(t +1) = 0so,
2t - 3 = 0
2t = 3
t = 3/2
t = 1.5 seconds
hence, the diver will take 1.5 seconds to reach the maximum height
Now , to find the maximum height ,
we'll insert the value of time taken in the given equation which is ↷
h(t) = -16t² + vt + sh(1.5) = -16(1.5)² + 8 x 1.5 + 24h(1.5) = -16 x 2.25 + 12 +24h(1.5) = -36 +12 +24h(1.5) = -36 +36h(1.5) = 0h = 0/ 1.5h = 0Hence , the maximum height the diver will reach in 1.5 seconds = 0
Derek mixed 150 milliliters of red dye with 175 milliliters of blue dye to make some purple dye. He used 85 milliliters of the purple dye to tie-dye a white T-shirt. How much purple dye did Derek have in the end?please I really need help
Answer:
= 240ml purple dye
Step-by-step explanation:
150ml red dye + 175ml blue dye = 325ml purple dye
325ml - 85ml = 240ml purple dye
= 240ml purple dye
help please, find the solution(s) for x In the equation below.
x2 + 7x = 8
OA. x = -1; x = 8
ОВ. x = 1; x = 8
OC. x = 1; x = 8
OD. x = -1; x = -8
Answer:
The correct answer is C, x = 1; x = -8
Step-by-step explanation:
[tex]x^2+7x=8[/tex]
[tex]x^2+7x-8=0[/tex] <== a = 1, b = 7, c = -8
[tex]x=\frac{-b\±\sqrt{b^2-4ac}}{2a} \\\\x=\frac{-7\±\sqrt{7^2-4*1*-8}}{2*1} \\\\x=\frac{-7\±\sqrt{7^2-4*-8}}{2} \\\\x=\frac{-7\±\sqrt{49+32}}{2} \\\\x=\frac{-7\±\sqrt{81}}{2} \\\\x=\frac{-7\±9}{2} \\\\x=\frac{-7+9}{2}\ \ and\ \ x=\frac{-7-9}{2} \\\\x=\frac{2}{2}\ \ and\ \ x=\frac{-16}{2} \\\\x=1\ \ and\ \ x-8\\\\x=1,\ x-8[/tex]
Hope this helps!
Alexander uses cupric chloride to etch circuit boards. He recorded the room temperature, in ^\circ\text{C} ∘ Cdegrees, start text, C, end text, and the etching rate, in \dfrac{\mu\text{m}}{\text{min}} min μm start fraction, mu, start text, m, end text, divided by, start text, m, i, n, end text, end fraction, of the cupric chloride. After plotting his results, Alexander noticed that the relationship between the two variables was fairly linear, so he used the data to calculate the following least squares regression equation for predicting the etching rate from the room temperature: \hat y = 2 +\dfrac{1}{5} x y ^ =2+ 5 1 xy, with, hat, on top, equals, 2, plus, start fraction, 1, divided by, 5, end fraction, x What is the residual if the room temperature was 25^\circ\text{C}25 ∘ C25, degrees, start text, C, end text and the cupric chloride had an etching rate of 5\dfrac{\mu\text{m}}{\text{min}}5 min μm 5, start fraction, mu, start text, m, end text, divided by, start text, m, i, n, end text, end fraction ?
The residual is the difference between the observed etching rate and the predicted etching rate
The residual of a room temperature of 25 degrees Celsius is [tex]- 2\dfrac{\mu\text{m}}{\text{min}}[/tex]
How to determine the residualThe least squares regression equation for predicting the etching rate from the room temperature is given as:
[tex]\hat y = 2 +\dfrac{1}{5} x[/tex]
When the room temperature is 25 degrees Celsius, the regression equation becomes
[tex]\hat y = 2 +\dfrac{1}{5} *25[/tex]
Evaluate the product
[tex]\hat y = 2 +5[/tex]
Evaluate the sum
[tex]\hat y = 7[/tex] --- this represents the predicted etching rate
The residual is calculated as:
Residual = Observed - Predicted
From the question, the observed etching rate is [tex]5\dfrac{\mu\text{m}}{\text{min}}[/tex]
So, the residual equation becomes
[tex]r = 5\dfrac{\mu\text{m}}{\text{min}} - 7\dfrac{\mu\text{m}}{\text{min}}[/tex]
Evaluate the difference
[tex]r = - 2\dfrac{\mu\text{m}}{\text{min}}[/tex]
Hence, the residual of a room temperature of 25 degrees Celsius is [tex]- 2\dfrac{\mu\text{m}}{\text{min}}[/tex]
Read more about residuals at:
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Determine if true:
10x3-20=20
Answer:
False
Step-by-step explanation:
10x3=30
30-20=10
10=20
These equations dont match.
Hence, the equation is false
Answer: This equation is FALSE. The left side 10 does not equal to the right side which is 20.
Step-by-step explanation:
What is the simple Interest if the amount of money borrowed is $2,300 at 6.5% for 7 years?
Answer:
Step-by-step explanation:
a regular hexagonal nut of side 1 cm and length 3 cm with a central hole of diameter 1 cm. 3 cm 1 cm 1 cm. Calculate the volume of metal in the nut. (Ignore the thread and give your answer correct to 3 significant figures.) (WAEC]
Answer:
5.44 cm³
Step-by-step explanation:
The volume of the hexagonal nut can be found by multiplying the area of the end face by the length of the nut. The end face area is the difference between the area of the hexagon and the area of the hole.
The area of a hexagon with side length s is given by ...
A = (3/2)√3·s²
For s=1 cm, the area is ...
A = (3/2)√3(1 cm)² = (3/2)√3 cm²
__
The area of a circle is given by ...
A = πr²
The radius of a circle with diameter 1 cm is 0.5 cm. Then the area of the hole is ...
A = π(0.5 cm)² = 0.25π cm²
__
The volume is the face area multiplied by the length, so is ...
V = Bh = ((3/2)√3 -0.25π)(3) . . . . . cm³
V = (9/2)√3 -0.75π cm³ ≈ 5.44 cm³
The volume of the metal is about 5.44 cm³.
HELLLPPPP PLEEEAAASE
Which equation has a solution of n = 4?
A, 6 + n = 24
B, 5n = 54
C, 12 - n = 16
D, 7n = 28
Answer:
D. 7n = 28
Step-by-step explanation:
Let's substitute 4 for n in each equation to check if it the resulting equation is correct:
[tex]6+n=24\\ 6+4=24\\ 10\neq 24\rightarrow \text{Incorrect!}[/tex]
[tex]5n=54\\5(4)=54\\20\neq54\rightarrow\text{Incorrect!}[/tex]
[tex]12-n=16\\12-4=16\\8\neq16\rightarrow\text{Incorrect!}[/tex]
[tex]7n=28\\7(4)=28\\28=28\rightarrow\text{Correct!}[/tex]
Therefore the answer is D
Step-by-step explanation:
7n=28divide both side by 7n=28\7n=4Solve for x. Can you please help me?
Answer:
6√3
Step-by-step explanation:
Let's take the vertical side in the middle as y and the side on the left as z.
We have:
from the right triangle on the right:
9²+y²=x²
from the right triangle over the big triangle:
z²+x²=(9+3)²=12²
from the right triangle on the left:
3²+y²=z²
We can use substitution in our three equations to get x.
9²+y²=x²
z²+x²=12²
3²+y²=z²
First, solve for y² in terms of x². We want everything in terms of x so we can solve for it.
9²+y²=x²
subtract 9² from both sides
x²-81 = y²
plug that into the third equation
3²+(x²-81)=z²
x²-72=z²
z²+x²=144 (the second equation)
plug x²-72 for z²
x²-72+x² = 144
add 72 to both sides
2x² =216
divide both sides by 2 to isolate x²
x²=108
square root both sides to get x
x = √108 = 6√3