The ratio of the number of math books to the number of comic books on a shelf is 7:3. There are 21 comic books on the shelf. Find the number of math books on the shelf.

There are 49 math books on the shelf.

Step-by-step explanation:

math books : comic books

                  :        

                  :        

÷

Step-by-step explanation:

Let the number of math books on the shelf be .

Cross multiply the ratio and solve for .

There are 49 math books on the shelf.

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.

      2

  2 is to go somewhat to the top right of a because it is squared    

v= a h/3