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ACT Math 5.5 Elementary Algebra
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ACT Math: Elementary Algebra Drill 5, Problem 5. How much 10% solution must be added to yield the correct concentration?

SAT Math 2.3 Numbers and Operations
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SAT Math 2.3 Numbers and Operations. If Joaquin invests $500, how much will the investment be worth after 3 years?

CAHSEE Math 1.1 Mathematical Reasoning
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CAHSEE Mathematical Reasoning: Drill 1, Problem 1. Based on this information, which of the following can be determined?

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If a shirt is on sale for $12 then how much did it cost before the sale? 385 Views


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Description:

Math Expression and Equations. If a shirt is on sale for $12 then how much did it cost before the sale?

Language:
English Language

Transcript

00:03

Here's your Shmoop dujour, brought to you by Gigantomart.

00:08

It seriously has everything, including a Walmart and a Target.

00:32

We could call our Aunt Flo, and she'd able to answer this for us in about two seconds...

00:37

because that woman knows her way around a sale.

00:40

But we'd rather not get roped into another hour-long discussion about her gout,

00:44

so let's try and go it alone.

00:46

Here's this shirt. It used to cost $X. That's what we're trying to find.

00:51

It went on sale for 35% off the regular price.

00:54

It now costs only $12.

01:07

We know we can write percents as decimals, something that would be really helpful in this instance.

01:11

So we can also express this equation as X - 0.35X = 12.

01:27

Our handy dandy calculator tells us that

01:31

12 over 0.65 equals 18.46,

01:34

which is our answer choice C.

01:37

As in, come help me with my gout.

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