Are these expressions equivalent?
why or not?

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

Reflect the point (7,0) across the y-axis