Ethan uses the function f(x) = 2x2 + 2x + 4 to track the temperature of a substance over 8 hours. you know that f(3) = 28 meaning that the temperature of the substance is 28°c when you plug in a 3 for x. what is the domain of ethan’s function?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Solve 2x+y=3 x+y=5 in substitution method

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars