I think you would have to multiply $4.92 and 6... if so the answer would be $29.52 for the unit price.
We want to find the product:

.
By the

, we distribute

over each of the three terms inside the parenthesis:

.
Multiplying the coefficients, and adding the exponents we get:

.
Answer:

.
Four times the sum of n plus six
Assuming you meant 45x^2y^2+18*3 , it should be 9(5x^2y^2+6)
Answer:
x=-36
Step-by-step explanation:
Add the 7/2x +1/2x to be 8/2x which means that it'll be 4x=18=9/2
then subtract 9/2x on both sides so itll be

-9/2x -9/2x
because if you do 8/2-9/2 it's -1/2
then multiply the reciprocal to both sides so

which then cancels out -1/2 and makes it
x=-36