# Write a math expressions with rates

But it makes sense that combined they're going to take less time than individually.

The year before Bill painted it by himself, but took twice as long as Anya did. Takes them 8 hours. And this was here as well, lawns per hour.

The left-hand side, 8A divided by 8 is just A. Two more goals than the average player.

## Unit rate examples

So you'll add those two together to figure out how much they can do in an hour. The unit rate is when the denominator of the fraction is 1 unit. Example Tony is at a car rental service to rent a car. Now lets see if this makes sense. There's z students at her school and they each plan to donate the same amount of books and reach a total of books. So she's gonna donate some of those books to her school. For every t hours. How much did they pay. Write your answer as an expression. And so we could say that Anya paints, or has A hours for one deck. Lets do a few more of these. It tells us, it tell this right here the year before Bill painted it by himself, but took twice as long as Anya did. The year before Bill painted it by himself, but took twice as long as Anya did. So now we have 3 plus 5 is 8.

Combined, it will take them 1 hour and The team scored a total of 36 goals this season. Anya plus Bill-- I'll do it in orange.

## Rate word problems

When we measure how fast a car or something is moving we are usually comparing quantities measured in different units like comparing distances with time. So the number of hours it takes Anya to paint a deck, or A, is 12 hours. She's going to donate her share of books to the school. So that's exactly what we want. Now let's take a look at a problem that involves unit price. Alright, so lets think about it. The number of hours Bill takes is twice as the number of hours Anya takes per deck. So A, the number of hours it takes Anya to paint a deck-- and I made it lowercase, which I shouldn't have. Well, if z students together are donating , each student is going to donate divided by z.

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