Use the property
(a -b)(a+ b) = a^2 - b^2
49x^2 - 81 = (7x + 9)((7x - 9)
<span>5 is a prime number. </span>
Answer:
15%
Step-by-step explanation:
23 is 115% of 20 therefore, we can know that 23 is a 15% increase from 20.
Answer: 6 more times
Explanation:
Start by finding out that 8x5=40 since he already walked the dog 5x for 8$each
Then you subtract that 40 from 88 and end up with 48
Then you divide that 48 by 8 since that’s the amount of money he makes per walk and end up with
6 walks
