At a bake sale there were 72 raisin cookies sold. if the ratio of raisin cookies sold to oatmeal cookies sold was 9: 1, what is the combined amount of raisin and oatmeal cookies sold?

The combined amount of raisin and oatmeal cookies sold=80.

Step-by-step explanation:

Let x be the combined amount of raisin and oatmeal cookies sold

Given:-

Amount of raisin cookies sold=72

The ratio of raisin cookies sold to oatmeal cookies sold = 9:1

Thus Amount of raisin cookies sold =

Therefore, the combined amount of raisin and oatmeal cookies sold=80.

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.