If c(x)=4x-2 and d (x)=x^2+5x, what is (c•d) (x)?

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

What are two numbers that add up to -9 and multiply to -10 best answer gets branliest and 100 extra points

Is the number 128.439 a rational number