For each situation described below, set up and solve an equation to answer the question.
4) stephanie is 15 years old. if she is 4 years older than kyle, how old is he ?
5) the sunglasses shack has lowered it's prices for a weekend sale. for certain pair of sunglasses, the price dropped $12. if the new price is $18, how much did the sunglasses cost originally?

180

step-by-step explanation:

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it