What is the algebraic expression for the following word phrase the sum of 7w and 5

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

Find the nonpermissible replacement for binthis expression. b2/5b +5

Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.