The amount Troy charges to mow a lawn is proportional to the time it takes him to mow the lawn. Troy charges $30 to mow a lawn that took him 1.5 hours to mow.

A. d = 20h

Step-by-step explanation:

Let the amount in dollars=d

Let the number of hours =h

Since the amount(d) Troy charges to mow the lawn is proportional to the time(h) it takes him to mow the lawn.

d=kh (k a variation constant)

Troy charges $30 to mow a lawn that took him 1.5 hours to mow.

d=$30, h=1.5 hrs

Substitution into the equation above gives:

30=k1.5

k=30/1.5=20

Substituting k=20 into the variation equation, we have:

d=20h

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb