What is the inverse of y=4-3x and is it a function

The factorization of 8x3 -125 is (2x-5)(jx2 +kx+25)

On average, how many more hits will he get when he bats 100 times at home during the day as opposed to 100 times away at night?

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