If f(x)=3x-15, what is f(4)a.-8b.3c.-3d.12

C. -3

Step-by-step explanation:

F(4) is another way of saying x=4. You can see it by the corresponding place of the 4 and x.

3(4)-15=y

12-15=y

-3=y

i believe the answer is 68cm

step-by-step explanation:

i just took 34 x 2 because the space between v and y is the same as y to k.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: