Charlie borrowed $500 from his aunt. He has already paid back $75. His aunt doesn't charge any interest and he is planning on making $15 payments each friday

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?

Milk and ice cream are mixed together for a recipe. the total volume of the mixture is 1 cup. if the milk contains 2% fat, the cream contains 18% fat ,and the mixture contains 6% fat ,how much cream is in the mixture