Answer:
x = 10.
y = 11
Step-by-step explanation:
2x+3y=53
3x-y=19
x = 10; y = 11
Answer:
Yes, this is proportional, if that's what your asking.
Step-by-step explanation:
Answer:
the answer is the mean
Step-by-step explanation:
you add all the numbers then divide by how many you have
7c + 12 = -4c + 78
+4c. +4c
11c + 12 = 78
-12. -12
11c = 66
11/11. 66/11
C = 6
Plug in the answer to check .
7 * 6 + 12 = 54
-4 * 6 + 78 = 54
54 = 54
Answer:
x² + 3x - 28
Step-by-step explanation:
Each term in the second factor is multiplied by each term in the first factor
(x + 7)(x - 4)
= x(x - 4) + 7(x - 4) ← distribute both parenthesis
= x² - 4x + 7x - 28 ← collect like terms
= x² + 3x - 28
