Answer:
40%
Step-by-step explanation:
Given,
Total no.of students=640Number of boys=384Number of girls=Total no.of students - Number of boys=256Here,
Percentage of girls=256/640×100%
= 40%
what is the value of a
Solve 2x^2 - 4x - 3 = 0
Using the Quadratic formula
(Show step by step how to get the answer because I gotta show my work)
The length of a rectangle is 5m longer than the width. The perimeter of the rectangle is 82m. Find the length and width of the rectangle.
Answer:
length: 23 mwidth: 18 mStep-by-step explanation:
The given dimensions are related by the perimeter formula for a rectangle.
Let w represent the width in meters. Then (w+5) represents the length. These values can be put into the perimeter formula, which can be solved to find w.
P = 2(L +W)
82 = 2((w+5) +w) . . . . fill in for L and W
41 = 2w +5 . . . . . . . . divide by 2
36 = 2w . . . . . . . . . subtract 5
18 = w . . . . . . . . . divide by 2. This is the width.
w+5 = 18+5 = 23 . . . . find the length
The length of the rectangle is 23 m; the width is 18 m.
Can someone please answer this for me
Answer:
x=18
Step-by-step explanation:
We'll assume that the shorter sides are AB and CD. Then 7x-6=5x+30. You add 6 to both sides. 7x=5x+36. Isolate x. 2x=36. Divide, and x=18.
Guys please helpppp!!!!
An equilateral triangle (all 3 sides are the same length) sits on top of a square. They both share the side AB
Answer:
6x +15
Step-by-step explanation:
To solve for the perimeter of the triangle, we need to find the length of each side.
(a +b)² = a² +2ab +b²
Let's factorise the expression for the area of the square:
Area of square
= 4x² +20x +25
= (2x +5)²
Since area of square= side ×side, length of a side of the square is the square root of its area. We are also given that the side of the square is AB.
(AB)²= (2x +5)²
Taking the square root of both sides:
AB= 2x +5
The perimeter is the sum of the lengths of all of its sides.
Perimeter of the triangle
= 3(AB)
= 3(2x +5)
= 6x +15
Gina wilson homework I need help fast it’s due tomorrow
ok so for whatw e do is mulitpy the numbers
What speed will a fan turn if the drive motor is turning at 1250 RPM, the motor pulley is 4 inches in diameter, and the fan pulley is 8 inches in diameter
The speed the fan will turn is 625 rpm
Linear speedSince they fan and the pulley ahve the same linear speed v = rω where
r = radius of pulley and ω = angular speed.Then
r₁ω₁ = r₂ω₂ where
r₁ = radius of fan pulley = 8 in/2 = 4 in, ω₁ = angular speed of fan pulley, r₂ = radius of motor pulley = 4 in/2 = 2 in, ω₂ = angular speed of motor pulley = 1250 rpm Angular speed of fan pulleyMaking ω₁ subject of the formula, we have
ω₁ = r₂ω₂/r₁
Substituting the values of the variables into the equation, we have
ω₁ = r₂ω₂/r₁
ω₁ = 2 in × 1250 rpm/4 in
ω₁ = 1250 rpm/2
ω₁ = 625 rpm
So, the speed the fan will turn is 625 rpm
Learn more about angular speed of pulley here:
https://brainly.com/question/2923987
s(x) = -2x - 2
t(x) = x² - 2
Find the value of s (t(3)).
Answer:
-16
Step-by-step explanation:
t(3)= 3²-2
= 7
s(t(3)) = -2×7-2
= -14-2
= -16
help asap!!!!!!!!!!!
Answer:
Step-by-step explanation:
Melissa ran 6. 4 miles north, 2. 75 miles west, and 2 1/3 miles south. How far did she run?
Answer:
About 11.48
Step-by-step explanation:
6.4+2.75+2 1/3
6.4+2.75=9.15
2 1/3=2.33
9.15+2.33=11.48
please answer the following and give a good explanation
Answer:
x = 8
z = 15
y = 118°
Step-by-step explanation:
First, we know that these are similar. That means that if we know which angles correspond to each other, those are equal, and the sides that correspond to each other have a common ratio. I went ahead and rotated PQRS so that it visually aligns with WXYZ -- that image is attached. We can do this because similar shapes must have the same angles, so aligning the angles works here. Using that, we can see that, based on the angles, QR matches up with XY, WZ matches up with PS, and so on.
We can then say that there is a common ratio between the corresponding sides.
WZ/PS = XW/PQ = ZY/RS = 9/6 = 12/x = z/10
9/6 simplifies to 3/2, so we have
3/2 = 12/x
multiply both sides by x to no longer have it as a denominator
3 * x / 2 = 12
multiply both sides by 2 and divide both sides by 3 to isolate x
x = 8
3/2 = z / 10
multiply both sides by 10 to isolate z
z = 15
In the corresponding figures, we can see that y matches up with ∠WXY. Thus, the two angles are equal and y = 118°
Really need help on this
Answer:
The function is t(n) = 3n - 9
eduardo has 4 1/2 yard of rope light. Exactly how many more yard does he need to finish the car's ceiling
Answer:
2 1/6
Step-by-step explanation:
Because the denominators are different, and there are whole numbers involved, then first make the fractions improper.
4 1/2 -> 9/2
6 2/3 -> 20/3
Next, make the denominators the same by multiplying each fraction by the denominator of the other.
9/2 * 3 = 27/6
20/3 * 2 = 40/6
Then you can subtract the numerators because the denominators are the same:
40/6-27/6= 13/6
Then you can convert to a mixed fraction if need be.
Charlotte has a large container of only red beads.
Harry has a large container of only blue beads.
Charlotte and Harry swap 40 beads.
This means that Charlotte gets 40 of Harry's blue beads in her container and Harry gets 40 of Charlotte's red beads in his container.
Charlotte now randomly picks 90 beads from her container and notices that 9 are blue.
Harry now randomly picks 80 beads from his container and notices that 70 are blue.
If all the beads were placed in one container, work out an estimate for the ratio of red to blue beads.
Simplify your answer fully.
Using it's concept, it is fond that the estimate for the ratio of red to blue beads is of 91:79.
What is the ratio between two amounts?The ratio between two amounts a and b is given by a divided by b, that is:
[tex]\frac{a}{b} = a:b[/tex]
In this problem, considering Charlotte's and Harry's beads, there are 81 + 10 = 91 red beads and 9 + 70 = 79 blue beads, hence the ratio is given by:
91:79.
More can be learned about ratios at https://brainly.com/question/19905617
-
(09.01 LC)
For f(x) = x2 and g(x) = (x - 5)2, in which direction and by how many units should f(x) be shifted to obtain g(x)? (5 points)
O Right 5 units
Up 5 units
Left 5 units
Down 5 units
Answer:
right 5 units
Step-by-step explanation:
given f(x) then f(x ± a) is a horizontal translation of f(x)
• if + a then a shift of a units left
• if - a then a shift of 5 units right
f(x) → g(x) = (x - 5)² with a = - 5
then f(x) is shifted 5 units right to obtain g(x)
Functions need 4,5 and 6!!! With work please!!
Step-by-step explanation:
You plug in the number that needs to be plugged in and then you solve like a normal equation.
6 cm
5 cm
13 cm
Area of figure
Answer:
option A by symmetry of figure.and then using formula of triangle and rectangle.
Step-by-step explanation:
A.) what are the slope and y-intercept for the linear function represented in the table
B.) write the equation in Y=MX+B form
The temperature during the day was 17°. If the temperature fell
21° at night, what was the temperature at night?
You can earn coins
Answer:
-4
Step-by-step explanation:
you subtract 21 from 17 and you get -4
Does anyone know the answer?
Answer:
The answer is A.
Step-by-step explanation:
You have one solution where the lines intersect, which is (-7, 6)
Fidget spinner: $20 Sale: 10% off What is the new cost of the fidget spinner?
Answer:
$18
Step-by-step explanation:
Given:
Sale for $20
Sale: 10% off
New cost of the fidget spinner
Solve:
$20 × 10% = 2 {Discount Price/off price}
$20 - 2 = $18 {New cost of the fidget spinner}
Thus, the new cost of the fidget spinner
~Lenvy~
The circumference of a circle is 69.08 meters. What is the circle's radius? Use 3.14 for .
Answer:
Circumference = 2πr
69.08 = 2× 3.14 × r
69.08 ÷ 6.28 = r
11m = r
Answer: 22
Step-by-step explanation: Divide the total by pi or 3.14 and the diameter is 22 and the radius is 11
Given the diagram, which theorem would you use to find AD?
8.4
D
B
8.4
20
A) Perpendicular Bisector Theorem
B) Converse of the Perpendicular Bisector Theorem
Angle Bisector Theorem
D) Converse of the Angle Bisector Theorem
ОА
OB
Ос
OD
Answer:
B
AD will be 20
Please mark me brainliestsquare root of 15, 2 times the square root of 3, 3 times the square root of 3, square root of 17 least to greastes get it right and u win 100 dollars
Answer: 9
Step-by-step explanation: Im guessing right now
PLEASE HELP!
BRAINLIEST ANSWER!!!!!!!!
Answer:
1) 1. 3/5
2. 6/10 which simplifies to 3/5
3. 9/15 which simplifies to 3/5
Step-by-step explanation:
let me know if there are specific questions you want me to answer. I did the first one, but I don't have time to answer them all right now. hopefully this gives you a good start
[tex]b:8:10=3:4:5\\ 9:12:15=3:4:5\ \left\{Calculation\right.[/tex]
[tex](3\times4):(4\times4):(5\times4)=12:16:20[/tex]
[tex]so\ the\ ratio\ will\ be\ the\ same[/tex] ← Answer
The critic rating and audience score for 8 movies are shown in the table.
Critic Rating 72 80 65 23 28 60 41 35
Audience Score 64 92 90 48 55 70 44 80
An owner of a movie theater is investigating whether critic rating can be used to predict the mean audience score of movies. Assuming the conditions for inference have been met, which of the following inference procedures is the most appropriate to estimate the mean change in audience score for each 1 point increase in the critic rating?
a: A one-sample tt-test for means
b: A linear regression tt-interval for slope
c: A two-sample tt-interval for a difference between means
d: A matched-pairs tt-interval for a mean difference
e: A two-sample zz-interval for a difference between proportions
A sludge pool is filled by two inlet pipes. One pipe can fill the pool in 10 days and the other pipe can fill it in 25 days. However, if no sewage is added, waste removal will empty the pool in 39 days. How long (in days) will it take the two inlet pipes to fill an empty pool?
Answer:
35 days because waste removals will empty the pool in 39 days
Jessica’s bike tire has a radius of 8 inches. Which equation could be used to find the circumference of the tire in inches?
The equation that could be used to find the circumference of the tire is P = 2πr and the circumference of the tire is 50.24 inche
What is circumference?A circumference is a total distance around a plane shape. It is also called perimeter
The equation for finding the circumference of a circle is given below
Formula:
P = 2πr............... Equation 1Where:
P = Circumference of the circleπ = Pie r = radius of the circleFrom the question,
Given:
r = 8 inchesπ = 3.14Substitute these values into equation 1
P = 2(3.14)(8)P = 50.24 inchesHence, The equation that could be used to find the circumference of the tire is P = 2πr and the circumference of the tire is 50.24 inches.
Learn more about circumference here: https://brainly.com/question/15673093
Find are the area of the 9 by 16 rectangle and add it to
the area of the triangle with base = 16 and height = 5.
Answer:
9×16=144
16×5=. 80
.: 144+80 =224
Step-by-step explanation:
The correct answer is 224
Timothy invested a total of $7,500 in two accounts. One account pays 3% interest annually; the other pays 2% interest annually. At the end of the year, Timothy earned a total of $175 in interest. Write and solve a system of equations' to find how much money Timothy invested in each account.
Timothy invested ___in 3% account and ______in the 2% account
Answer:
Timothy invested $2500 in 3% account and $5000 in the 2% accountStep-by-step explanation:
Let the investments be x and y.
Required equations are:
x + y = 75000.03x + 0.02y = 175Solve the system by elimination, multiply the second equation by 50 and subtract the first one:
50(0.03x) + 50(0.02y) - x - y = 50(175) - 75001.5x - x = 12500.5x = 1250x = 2500Find the value of y:
2500 + y = 7500y = 5000