In 1924, the temperature in Fairfield, Montana, dropped from 63 degrees to -21 degrees in 12 hours. What was the change in temperature? PLS ANSWER ASAP

Equation for the calculation double 2 and then add 5

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

Set up and solve a proportion for the following application problem. if 55 pounds of grass seed cover 404 square feet, how many pounds are needed for 7272 square feet?