If f(x)=3(x+4) find f(2)

f(2)=18

Step-by-step explanation:

Substitute 2 in for x

f(x)=3(x+4)

f(2)=3(2+4)

Solve the parentheses first (PEMDAS)

f(2)=3(6)

Multiply

f(2)=18

Hope this helps! :)

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.