The measure of angle is 7 what is the measure of its complementary angle

What is the value of x in the following equation. -x ^3/2 = -27

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?