please help as soon as possible, we are supposed to find perimeter and area, I am not very good at this​

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?