E(n) is an even-number function. find e(9) when e(n)=2n

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

The multiplicative property of equality states that for real numbers a, b, c, and d, if a = b and c = d, then ac = bd. true false

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a