Answer:
x = - 22, x = 4
Step-by-step explanation:
Given
(x + 9)² = 169 ( take the square root of both sides )
x + 9 = ± = ± 13 ( subtract 9 from both sides )
x = - 9 ± 13
Thus
x = - 9 - 13 = - 22
x = - 9 + 13 = 4
Answer:
12
Step-by-step explanation:
All you have to do is subtract 30 and 18 and your answer is 12.
Answer:
$40
Step-by-step explanation:
The use of the word "mental math" means round to the nearest whole. By doing this you turn $12.98 into $13 and $1.02 into $1 which will give you $40 in total. This problem doesn't need to round as it is a simple problem. The true answer is $12.98 + $17.50 + $8.50 +$1.02= $40.
Answer:
He made seven A's.
Step-by-step explanation:
360-220=140
140/20=7