Aplumber charges a customer 60 dollars an hour plus the price of any parts needed to complete the work. if the total bill is 240 dollars and just the parts alone cost 90 dollars, how long did it take to complete the work.

4 hours

300 minutes

2.5 hours

6.17 hours

4

step-by-step explanation:

360/29

step-by-step explanation:

e

step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)

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