Please help middle row number 6 a and b please show work a) 4x^2 + 4x + 36 = 0
b) 3x^2 - 18x - 48 = 0

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Identify which functions are linear or non-linear. a. f(x) = x2 + 1 b. f(x) = 2x + 5 c. f(x) = x 2 + 3 d. f(x) = 3 x + 7 e. f(x) = 4x + 10 2 - 5

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics