The number next to a variable, for example: 5x, is called a coefficient. And all you do is multiply the number with the variable
just separate the ramge and domain
If you rounded off 129 to the nearest ten the answer would be 130
An imaginary number is a complex number that can be written as a real number multiplied by the imaginary unit i, which is defined by it's property i² = −1. The square of an imaginary number bi is −b². For example, 5i is an imaginary number, and it's square is −25.
