Answer:
No, he is incorrect because he forgot to multiple the negative by the x, and only multiplied 3 by x instead of -3 by x.
Step-by-step explanation:
The correct re-write of this expression is:
-3x - 30
A) 27, 81
b) -30,-15
c) -3, 1
d) -320, 1280
Answer:

Step-by-step explanation:

Combine like terms, rewrite the equation and perform the operations between the coefficients,


Answer: 16%
Step-by-step explanation:
168.2 - 145 = 23.2
23.2/145 = 0.16
0.16 as a percent is 16%
Answer:
x=-7
Step-by-step explanation: