The answer to this is 15 because you would multiply 5*3 to get you answer or you could do 5+5+5 either way it equals 15
Answer: 
Step-by-step explanation:
First, we will rewrite the function in terms of <em>y</em> as in y = x - 12.
Second, we will swap the x and y values.
y = x - 12
x = y - 12
Third, we will solve for y. In other words, we will isolate the <em>y</em> variable and get it "by itself" on one side of the equal sign.
x = y - 12
x + 12 = y
y = x + 12
Lastly, we will change y back into terms of the function, but the inverse.

<em>Learn more about the </em><em>inverse of a function</em><em> here:</em>
<em>brainly.com/question/940569</em>
Let
Y be the age of Franco's dad.
X Franco's age
Y = 3*X (1)
(Y +10) = 2*(X+10) +2 (2)
(3*X +10) = 2*X +20 +2
(3-2)X = 22 -10
X = 12 years old (Franco)
Y = 3*12 = 36 years old (Franco's dad)
372 is the answer.
(9*6*3)+(10*7*3)=372
Multiply what’s on the outside to the inside, the variable is always a lower case letter such as x,