Write a system of equations:

A membership at Ace Gym is $30 per month plus a one-time registration fee of $100.

A membership at Bold’s Gym is $50 per month, and there is no registration fee.

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

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5