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1
1. An ad for a computer printer stated that you could buy the printer for only $280.00, or 80 % of the original price . What was the original price of the printer?
2. After 35 minutes Hayden had completed 7/10 of his math test. If he has a total of 55 minutes to complete the test, do you think he will finish on time?
Expert Solution
Let the original price of the printer be P
Then we know that 80% of P is 280
80% is equivalent to 80/100 = 8/10
Thus:
8/10 * P = 280
P = 280 *10/8 = 350
The printer's original price is $350
Let T be the total time it takes Hayden to finish the test.
We know that 7/10 of this time is 35 minutes.
Hence:
7/10 * T = 35
T = 35*10/7 =350/7 = 50
It will take Hayden 50 minutes to complete the test. Therefore he will finish on time.
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