If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (c x d)(x)?
a- 4x3 + 18x2 – 10x
b- x2 + 9x – 2
c- 16x2 + 4x – 6
d- 4x2 + 20x – 2

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

Can anyone explain to me how to do this? anything will .

The lengths of two sides of a triangle are 9 and 15. what can be said about the length of the third side? a. it must be greater than or equal to 6 and less than 24. b. it must be greater than or equal to 6 and at most 24. c. it must be greater than 6 and less than 24. d. it must be greater than 6 and at most 24.