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3 years ago

I REALLY NEED HELP!!!!

Mathematics

1 answer:

LekaFEV [45]3 years ago

4 0

10. The perimeter doubles and becomes 64in.

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Car A travels 20 mph faster than Car B. In the same time that Car A travels 252 miles, Car B travels 196 miles. Find their speed

RoseWind [281]

Answer:

A = 70

B = 90

Step-by-step explanation:

We know that Car A travels 20 mph faster than Car B.

Assuming the speed of Car B to be x and the speed of Car A to be x+20, we can write:

$\frac{196}{x} =\frac{252}{x+20}$

Taking the reciprocal of both sides to make x the subject:

$196(x+20)=252x$

$196x+3920=252x$

$252x-196x=3920$

$56x=3920$

$x=70$ ---> speed of Car A

Finding the speed of Car B: $x+20 = 70+20=90$

Therefore, the speed of Car A = 70 and the speed of Car B = 90.

8 0

3 years ago

HELP!!! 40 PTS! What is its area? Show your work

Vadim26 [7]

a is height p is perimeter

6 0

3 years ago

The mass of the Earth is 5.972x10^24 kg. the mass of the moon is 7.3 x 10^22kg. find the total mass, in kg, of the Earth and the

torisob [31]

Answer:

6045000000000000000000000 kg.

Step-by-step explanation:

We have been given that the mass of Earth is $5.972\times10^{24}$ kg. The mass of the Moon is $7.3\times10^{22}$ kg.

To find the total mass we will add mass of Earth and Moon.

First of all let us convert the given masses in standard form.

$5.972\times10^{24}=5972000000000000000000000$

$7.3\times10^{22}=73000000000000000000000$

$5.972\times10^{24}+7.3\times10^{22}$

$5972000000000000000000000+73000000000000000000000$

$6045000000000000000000000$

Therefore, the mass of Earth and Moon is 6045000000000000000000000 kg.

8 0

3 years ago

Can someone help me with this If 5y*2=80 y=?

Temka [501]

If 5y*2=80 then y is equal to 8

8 0

3 years ago

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Change the following decimal numbers to percents. .25 .278 2.9 3.0 0.67

umka2103 [35]

25=2,500, 278= 27800%, 2.9=290, 3.0=300, 0.67= 67

3 0

3 years ago

Read 2 more answers