Is (2,-1) a solution of 2x-y=5? Explain and solve please and thank you.

Match each function with its rate of growth or decay

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

What’s -11-33k and factor each expression completely