9. will bought 3 college textbooks. one cost $32, one cost $45, and one cost $39. what is the average price of his books? choose the statement that correctly calculates the average. a. $32 + $45 + $39 ÷ 3 b. ($32 + $45 + $39) ÷ 3 c. $32 ÷ 3 + $45 ÷ 3 + $39 d. 3 × $32 + $45 + $39

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Which function has the domain x> -11