Markup= original cost x percentage markup

Selling price= original cost + markup

The manufacturing cost of a cell phone was $124. Sellers first marked up the cost by 20 percent . Sales were poor so sellers decreased the markup to 15 percent . Calculate the old and new selling prices .

A. Old price $170.00; new price $148.80

B. Old price $142.60; new price $148.80

C. Old price $148.80; new price $142.60

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3

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