C. 4x + y = 21
4(3) + 9 = 21
12 + 9 = 21
21 = 21
Answer:
Step-by-step explanation:
Value of Sam's car after t years =
=
Value of Sam's car in 5 years=

= $ 4437
28a⁴b: 2 · 2 · 7 · a · a · a · a · b
16ab: 2 · 2 · 2 · 2 · a · b
GCF(28a⁴b, 16ab) = 4ab
The answer is A.
12x - 56 = y. Hope it helps! :) If you could vote my answer as the brainiest, that would be awesome! :)
To solve this, I used guess and check.
I started by finding 60²=3600 and 70²=4900. 70² is too much, so I then did 65²=4,225.
After 65², I did 62²=3,844. I knew that was pretty close, so I did 64. 64²=4,096 and 63²=3,969. So, 64² was it.
4,096-4015=81
So, you would need to add 81 to 4015 in order to receive a perfect square, which is 64²(4,096).