Step-by-step explanation:
x + y = 72
x - y = 40
x = y + 40
so, the first equation is then
y + 40 + y = 72
2y + 40 = 72
2y = 32
y = 16
x = y + 40 = 16 + 40 = 56
Answer:
9
Step-by-step explanation:
cube root the number
A variable is a letter that replaces an unknown number.
-3.5(2-3n)-2.5n=-7+10.5n-2.5n
=-7+8n
So the answer is B
How many questions is it if more than 5 no thanks