PLS HELP Use the rules of equations and inverse operations to solve the equation. In your final answer, include all of your work.
4 - x^2 = -16

Without graphing the linear functions, find the coordinates of the point of intersection of their graphs: y=3x−11 and y=4

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

The angle of elevation from point a to the top of a cliff is 38 degrees . if point a is 80 feet from the base of the cliff , how high is the cliff ?