Which expression is equivalent to 9 x 9 x 9 + 12 x 12 x 12?

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

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

The ratios of boys to girls on a soccer league is 2: 5. if there are 28 boys, how many girls are playing soccer? extra points! will mark as brainiest asap