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ikadub [295]
3 years ago
13

Sweaters already on sale for 30% off the regular price cost $28 when purchased with a promotional coupon that allows an addition

al 20% discount. Find the original price. (hint: when you save 20%, you are paying 80%.)
Mathematics
1 answer:
hoa [83]3 years ago
3 0

The original price was $50.

To find this we need to start with the price you paid ($28). We then use this cost to find the pre-coupon price. Since the coupon affords a 20% discount, that means you pay for 80%. To solve this, simply divide the price you paid by the percentage you paid.

$28/.80 = $35.

Now that we have the pre-coupon price ($35), we can use that to find the original price. Again, we'd want to divide that by the percentage you paid for, which is 70%.

$35/.70 = $50

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Nina [5.8K]

Answer:

The temperature decreased by 9 °F in <u>6 days.</u>

Step-by-step explanation:

Let the number of days it takes for the temperature to decrease by 9 °F be x.

Given:

Average daily temperature decreases by 1\frac{1}{2} °F.

Decrease of temperature in 1 day = 1\frac{1}{2}= 1.5 °F.

∴ Decrease in temperature in x days is 1.5x.

Now, as per question, decrease in temperature in 'x' days is 9 °F.

Therefore, 1.5x=9

x=\frac{9}{1.5}

x=6

Therefore, the temperature decreased by 9 °F in 6 days.

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