Solve the quadratic equation by completing the square.

4x2 + 8x - 7 = 0

Use multiples to write two fractions equivalent to 7/9. 14/18, 8/10 6/8, 21/27 10/12, 28/36 14/18, 21/27

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

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?