Can someone solve this pleasee​

The perimiter of a rectangle is 70 inches the legneth of the rectangle is 5 less than 3 times the width of the rectangle what is the width of the rectangle

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

Hurry which expression is equivalent to 3√x^5y?