Answer:
The total money raised was 
Step-by-step explanation:
Let
x -----> the number of adult tickets
y -----> the number of children's tickets
we know that
The algebraic expression that represent the total amount of money raised from the sale of tickets is

For x=234, y=388
substitute in the algebraic expression

Multiply 200 rolls by 70%
200 *0.70 = 140
The bowler should knock at least 6 pins down 140 rolls
Answer:
Profit = 75
Step-by-step explanation:
Selling price of 3 oranges = 2
There are 210÷3 = 70 set of oranges
Selling price of 1 set (3 oranges) of orange = 2
Selling price of 70 set of oranges = 70 * 2 = 140
Cost of 210 oranges = 65
Profit = selling price - cost price
= 140 - 65
= 75