Consider the sequence of steps to solve the equation: 3(x − 4) + 5x = 9x − 36
given ⇒ 3(x − 4) + 5x = 9x − 36
step 1 ⇒ 3x − 12 + 5x = 9x − 36
step 2 ⇒ 3x + 5x − 12 = 9x − 36
step 3 ⇒ 8x − 12 = 9x − 36
step 4 ⇒ 8x − 8x − 12 = 9x − 8x − 36
step 5 ⇒ 0 − 12 = x − 36
step 6 ⇒ −12 = x − 36
step 7 ⇒ −12 + 36 = x − 36 + 36
step 8 ⇒ 24 = x + 0
step 9 ⇒ 24 = x
which property yields step 2?
a) additive inverse property
b) additive identity property
c) addition property of equality
d) commutative property of addition

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

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