What is the square of 2/3

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.