The Smith family drove at an average speed of 72 miles per hour. They drove for 8 hours. How far did the Smith family drive?

576 miles

Step-by-step explanation:

If they drove for 8 hours and they drove at 72 miles per hour the equation would be 72 * 8

72 * 8 = 576 miles

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.