Joe is building a post for his mailbox. to find the correct dimensions, he needs to expand this expression: (x-3) (x-9) (x-4) select the equivalent expression written in the format ax3(cubed) + bx2(squared) +cx+d

Step-by-step explanation:

Given:

The expression to expand is given as:

Let us expand the first two binomials of the given expression using FOIL method.

The FOIL method states that:

Now, let us multiply the result with the remaining binomial. Multiplying each term of the trinomial with each term of the binomial, we get:

Therefore, the equivalent expression after expanding is given as:

step-by-step explanation:

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17