Answer: The given expression
simplified to 
Step-by-step explanation:
Given : expression 
We have to simplify the given expression 
Consider the given expression 
Divide the numbers 

Apply exponent rule, 
We have,


Cancel out common factor b,
We have

Thus, the given expression
simplified to 
X + y = 400
8x + 5y = 2750
-5x - 5y = -2000
8x + 5y = 2750
3x = 750
250 adult tickets
150 children tickets
Let's review the options:
A. 169-26y+y^2 can be factorised into (13-y)(13-y)
B. 81+18y+y^2 can be factorised into (9+y)(9+y)
C. 64+8y+y^2 cannot be factorised into double brackets
D. 25+10y+y^2 can be factorised into (5+y)(5+y)
Therefore your answer is the odd one out, C.
C
work:
75 is equal to 2x+15
75-15 = 60
60/2 = 30
x=30
Answer:
Solution:
the boat's speed in still water: x
The speed with current: (x+3)
The speed against current: (x-3)
The equation is
3(x+3) = 4(x-3)
x = 21 mph
The distance = 3*(21+3)= 72 miles
I choose (A)
Step-by-step explanation: