# CAHSEE Math 2.4 Mathematical Reasoning

Mathematical Reasoning Drill 2 Problem 4. Which of the following expressions tells how much he spends on rent per month?

 Algebra Create equations that describe numbers or relationshipsExpressionsInterpret the structure of expressions CAHSEE Math Mathematical Reasoning Language English Language Mathematical Reasoning Analyzing problems

### Transcript

00:21

…which of the following expressions tells how much he spends on rent per month?

00:26

And here are the potential answers...

00:30

OK, so this question is asking for an expression for how much John spends on rent per month.

00:36

Since we're not given any actual money values, we can use variables.

00:40

So to find rent spent per month, we have to find the

00:44

total rent spent divided by number of months, or y.

00:48

Since we know x is the total amount of money on housing John spent, and z is the security deposit…

00:55

…we can find total rent spent but just taking x minus z.

01:00

So rent spent per month is total rent spent, or x minus z over y, number of months.

01:07

So the answer is B. That's it. Bye.