Answer:


Step-by-step explanation:
1) y + 4 + 3(y + 2)
Expand:-

Combine like terms:-


__
2) 0.5(x⁴ - 3) + 12
Expand:-

Add/Subtract Numbers:-

___________________
Answer: The percent gain was 25%.
Step-by-step explanation:
Given, Cost price of lot = $1,200
Selling price of lot = $1,500
The percent gain = 
⇒ Percent gain =

Hence, the percent gain was 25% based on his purchase.
Answer:
11.2
Step-by-step explanation:
divide 160 by 14.3
Answer:
B
Step-by-step explanation:
6x + 30 + 4x = 10(x+3)
10x + 30 = 10x + 30
0 = 0