Gretchen withdrew $31.45 from the bank to buy groceries. then she deposited a check for $27.89 in the bank. which expression represents the net change in her account balance as a result of these two transactions? what is the net change in her account balance?

The table shows the results of three plays in a football game. what is the net result of the three plays? football game 1st play 5 yards 2nd play -9 yards 3rd play 12 yards

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)