Two cars leave town at the same time in opposite directions. the average rate of speed of one car is 15 miles per hour faster than the average rate of speed of the other car. the cars are 375 miles apart after 3 hours find the average weight of speed of the two cars.

The average rates of speed are 55 and 70 mph (miles per hour)

Step-by-step explanation:

3x+3*(x+15)=375

6x+45=375

6x=330

x=55

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.