Subtract $a-4$ from $4a+16$ and simplify your answer. The variable $a$ should appear only once in your answer.

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

The square root of 9x plus 7 plus the square rot of 2x equall to 7

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible