Pascha is factoring the polynomial, which has four terms. 3x3 – 15x2 + 8x – 40

3x2(x – 5) + 8(x – 5)

Which is the completely factored form of her polynomial?

(3x2 – 5) (x + 8)
(3x2 – 8) (x + 5)
(3x2 + 8) (x – 5)
(3x2 + 5) (x – 8)

Im so bad at fractions they are not my best math thing to work on

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95