Answer:
50%
Step-by-step explanation:
Answer:
669 dollars and 70 cents
Step-by-step explanation:
just minus all the money spent and add the money added
Answer:
<h2>c. x = -4 or x = 9</h2>
Step-by-step explanation:

Domain:

solution:

use <em>(a - b)(a + b) = a² - b²</em>

multiply both sides by (x - 3) ≠ 0

cancel (x - 3)

subtract
from both sides

cross multiply

use FOIL

subtract 4x from both sides

combine like terms

change the signs

The product is 0 if one of the factors is 0. Therefore:

<em>add 9 to both sides</em>

<em>subtract 4 from both sides</em>

The original value of x was negative, then –x, the opposite-signed version of x, would have to be positive. For instance, if I start with x = –3, then –x = –(–3) = +3, which is positive.
3 because 7*3=21,...........