Batteries cost $7.85 / pack. How many packs did Ryan buy if he spent $54.95?

7

Step-by-step explanation:

54.95 / 7.85= 7

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.

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.