PLEASEEE IVE BEEN STUCK ON THISSS SOMEONE HELP ME ASAP!

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'