Question

The equation R=10a-20 represents the revenue R (in dollars) you make by spending A dollars on advertising. You revenue totaled $110. How much did you spend on advertising

Answer 1

R = 10a - 20
ur revenue totaled 110...so R = 110

110 = 10a - 20
110 + 20 = 10a
130 = 10a
130/10 = a
13 = a <== so u spent $13 on advertising

Answer 2

13 dollars

Explanation:

We have that the equation that represents the revenue R in dollars is:

R=10a-20

Where:

R= revenue

a= spending dollars on advertising

We know that R= 110 dollars, now we have to substitute in the formula and solve:

110 = 10a-20

Solving:

110+20 = 10a

130 = 10a

130/10 = a

13=a