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mestny [16]
3 years ago
14

Sean wants to buy a skateboard that sells 49.99 an advertisement says that next week the skateboard will be on sale for 42.50 ho

w much will Sean save if he waits until next week to buy the skateboard?
Mathematics
2 answers:
Cerrena [4.2K]3 years ago
8 0
$49.99 - $42.50 = $7.49
yulyashka [42]3 years ago
3 0
You need to add
49.99 + 42.50
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You usually buy a 16.5-ounce bottle of shampoo. There is a new bottle that says it gives you 30% more free.
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Answer:

\frac{x-16.5}{16.5}=0.30

Hopefully, this is your desired setup. (I noticed the formula you have to fill in there.)

Have a good day.

Step-by-step explanation:

Hi.

You could use the percent change formula.

Since we know it is a percent increase then we will do new-old instead of old-new:

\frac{\text{new}-\text{old}}{\old}

x is the new amount of shampoo.

16.5 is the original amount (old) of shampoo.

The percent increase is 30%=0.30 .

So we have the following equation:

\frac{x-16.5}{16.5}=0.30

We could have found the equation like this:

16.5+16.5(0.30)=x

Subtract 16.5 on both sides:

16.5(0.30)=x-16.5

Divide both sides by 16.5:

0.30=\frac{x-16.5}{16.5}

By us of symmetric property of equality:

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