585 divided by 83 what's the answer

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

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.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?