Twenty students in class a and 20 students in class b were asked how many hours they took to prepare for an exam.

The solution set for 5v2 – 125 = 0 is

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

X+y=-4 x-y=2 use elimination with adding and subtraction