Answer:
the simplest form of the given expression is 
Step-by-step explanation:
Given;

The above expression can be simplified as follows;

Therefore, the simplest form of the given expression is 
Answer:
I don't know I'm really sorry please don't be angry
and if you want my social media cause your angry I'll give
Answer:
21x + 35y
Step-by-step explanation:
Distribute the 7 to everything in the parentheses.
7*3=21
7*5=35
Step-by-step explanation:
156 , 52 times by 3 is 156
Answer:
25%
Step-by-step explanation:
The average cost of the automobile in 2013 is $16,000
The present cost now is $20,000
Therefore the rate of increase between the two automobiles can be calculated as follows
= 20,000-16,000/16,000
= 4,000/16,000
= 0.25×100
= 25%
Hence the rate of increase is 25%