If –1 is a root of f(x), which of the following must be true? a factor of f(x) is (x – 1). a factor of f(x) is (x + 1). both (x – 1) and (x + 1) are factors of f(x). neither (x – 1) nor (x + 1) is a factor of f(x).

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.

x

step-by-step explanation:

your answer is 228

step-by-step explanation:

add the top and bottom bases together, then divide them by 2, then multiply by the height.