HELP Claymore electronics sold 81 computers and 52 printers last week. Twenty-five separate customers purchased computers and printers. How many customers purchased only computers.

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?