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2 years ago

Three times a number decreased by 2 equals forty

Mathematics

1 answer:

Naddik [55]2 years ago

8 0

Answer:

Step-by-step explanation:

40 plus 2 is 42

42 divided by 3 is 14

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Estimate the unit rate to the nearest hundredth $2.35 12 Grade AA eggs.

Wewaii [24]

Answer:

2.4

Step-by-step explanation:

6 0

3 years ago

A storage tank will have a circular base of radius r and a height of r. The tank can be either cylindrical or hemispherical (ha

Neko [114]

Answer:

Volume: $\frac{2}{3}\pi r^3$

Ratio: $\frac{2}{9}r$

Step-by-step explanation:

First of all, we need to find the volume of the hemispherical tank.

The volume of a sphere is given by:

$V=\frac{4}{3}\pi r^3$

where

r is the radius of the sphere

V is the volume

Here, we have a hemispherical tank: a hemisphere is exactly a sphere cut in a half, so its volume is half that of the sphere:

$V'=\frac{V}{2}=\frac{\frac{4}{3}\pi r^3}{2}=\frac{2}{3}\pi r^3$

Now we want to find the ratio between the volume of the hemisphere and its surface area.

The surface area of a sphere is

$A=4 \pi r^2$

For a hemisphere, the area of the curved part of the surface is therefore half of this value, so $2\pi r^2$ . Moreover, we have to add the surface of the base, which is $\pi r^2$ . So the total surface area of the hemispherical tank is

$A'=2\pi r^2 + \pi r^2 = 3 \pi r^2$

Therefore, the ratio betwen the volume and the surface area of the hemisphere is

$\frac{V'}{A'}=\frac{\frac{2}{3}\pi r^3}{3\pi r^2}=\frac{2}{9}r$

6 0

2 years ago

A sporting goods sold 2.5 times as many football as basketball last year drag footballs to represent the number of football sold

arlik [135]

Answer:

5 footballs were sold for every 2 basketballs sold.

Step-by-step explanation:

2.5 times as many football as basketball was sold last year

This can be represented as

1 basket ball sold = 2.5 footballs sold

for every 2 basketball sold, number of football sold = 2.5 x 2 = 5 footballs

4 0

3 years ago

Estimate the unit rate is 12 pair of socks sale for $5.79

lesantik [10]

About $0.48
you can make an equation
12/5.79 = 1/x

8 0

2 years ago

Marc left his house to drive to work. As he heads down his street, his speed increases steadily until he sees the stop sign at t

lesantik [10]

The third graph i believe ot sure tho but i remeber taking this quiz and it was tht anwser

3 0

3 years ago

Read 2 more answers