For this case we have the following fractions:

So we have to:

This is equivalent to:

Answer:

The answer is Option A
From the expression 2f + 5(8-f), we know that Karla caught f purple dot fish, and (8-f) green dot fish, because green dot fish gives 5 points.
2f -points for the purple dot fish, f is a number of the purple dot fish.
5(8-f) - points for the green dot fish, (8-f) is a number of the green dot fish.
So,
altogether she made 8 attempts.
One attempt cost 50 cents,
8 attempts cost 8*50=400 cents = $ 4.
Answer is B. 4 (dollars).
1) 3 hours 21 minutes
2) 1 hour 50 minutes
3) 2 hours 13 minutes
4) 2 hours 16 minutes
5) 3 hours 25 minutes
6)1 hour 29 minutes
7)1 hour 16 minutes
8) 3 hours 24 minutes
9) 4 hours 14 minutes
10) 3 hours 45 minutes
11) 4 hours 22 minutes
12) 2 hours 58 minutes
13) 1 hours 24 minutes
14) 1 hours 14 minutes
15) 4 hours 23 minutes
answer:
The answer to this question is x=10
How many boxes are there in total?