Mr. abernathy purchases a selection of wrenches for his shop. his bill was $78. he buys the same number of $1.50 and $2.50 wrenches, and half that many $4 wrenches. the number of $3 wrenches is one more than the number of $4 wrenches. how many of each did he purchase?

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

whatvare the choices

step-by-step explanation:

3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4