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3 years ago

The ratio of boys to girls in Anaya’s class is 10 to 15. There are 20 boys how many girls are there

Mathematics

1 answer:

ASHA 777 [7]3 years ago

7 0

Answer:

30 girls

Step-by-step explanation:

10 x 2= 20

15x2=30

For every 10 boys there are 15 girls. since 20 is just 10 multiplied by 2 you can multiply 15 by 2

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A cube with sides 5 inches, and a pyramid with base edges 5 inches. What is the height, so that the volume of the cube and the p

Ostrovityanka [42]

15 inches is the height of the pyramid

Step-by-step explanation:

The volume of a cube is a³

Given a = 5 inches

→ Volume = a³

= 5³

= 5×5×5

= 125 in²

The volume of a pyramid is $\frac{1}{3} {a}^{2}h$

Given a = 5 inches , h = height of pyramid

$= > \frac{1}{3} {a}^{2} h$

$= > \frac{1}{3}(5)^{2}h$

$= > \frac{1}{3} \times 25 \times h$

$= > \frac{25}{3}h$

then,

$125 = \frac{25h}{3}$

$= > 25h = 125 \times 3$

$= > 25h = 375$

$= > h = \frac{375}{25}$

$= > h = 15$

Hence, the height of pyramid is 15 inches

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2 years ago

What is the surface area of the triangular prism?

ozzi

Answer:

SA = bh + (s1 + s2 + s3)H

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

A florist bought 268 roses, 74 tulips and some lilies. She bought a total of 390 flowers. The florist will buy five times as man

lubasha [3.4K]

Lilies :
$390 - 268 - 74 = 48$

$48 \times 5 = 240$

Total number of lilies the florist will buy next week = 240

Hope this helps. - M

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3 years ago

Solve for the area (A) of a rectangle if the length (l) is 4x and the width (W) is 5x*. Remember Area = length x width

Harrizon [31]

Answer:

If area = length * width that means the answer is 4x * 5x = 20x².

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3 years ago

If f x is a linear function, f(-1)=3, and f(1)=5, find an equation for f(x)

BartSMP [9]

The equation of f(x) is f(x) = x + 4

<h3>How to determine the equation?</h3>

The given parameters are

f(-1) = 3 and f(1) = 5

Start by calculating the slope (m) using:

$m = \frac{f(1) - f(-1)}{1 - -1}$

This gives

$m = \frac{5 - 3}{1 + 1}$

Evaluate

m = 1

The equation is then calculated as;

f(x) = m(x - x1) + f(-1)

This gives

f(x) = 1(x + 1) + 3

Expand

f(x) = x + 4

Hence, the equation of f(x) is f(x) = x + 4