Explain this and what method? Is it linear combos or some sort of GCF finding

just subtracting the expression for revenue from the expression for cost

Step-by-step explanation:

  2x^3 + 30x - 130

-  2x^3 - 3x - 520

(subtracting means adding the opposite)

2x^3 - 2x^3 = 0

30x - (-3x) = 33x

-130 - (-520) = 390

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

hello i might . what do you need.

friend me