Why would multiplying both the dividend and the divisor by 10 sometimes make a problem easier to solve?

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.

Solve -3 (r + 5) = -9 enter ur answer in the box x = __