Answer:
Step-by-step explanation:
It will take 8 hours to fill the swimming pool. There is already 9,000 gallons filled, that leaves you with 12,000. 12,000 divided by the rate per hour 1,500. That gives you 8.
If you're looking for which of these has the best price, the answer would be the first one, since it is the cheapest out of the 4. If that's not the right way to solve it, let me know!
It is twice as likely to be red as it is to be blue
Ah, great question. Let me help you on this one.
We need to balance both equations for this to work out. This is needed because question asks us for an x variable that will make both equations equal to each other.
Let's write it out so it's easier for us to understand.
Let's not forget to multiply both sides by 100.

Let's start by subtracting 45 from both sides.

Let's simplify it.

Now, we need to subtract 375 from both sides.

Simplify it once again.

Divide both sides by -125
This plan will be the same cost after 36 movies.