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kileylynn
21.04.2021 •
Mathematics
A game decreased in price by 1/6
After the reduction it was priced at £75.
What was the original price of the game?
Solved
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Ответ:
Step-by-step explanation:
original price is x
Then the decreased price will be ' x - x/6'
= 5x/6
5x/6= 75
x= (75×6)/5
x= 90
original price = £90
Ответ:
£90
Step-by-step explanation:
Since it was decreased by 1/6, it is 5/6 of the original price.
divide 75 by 5 to get 15.
15 is 1/6 of the price.
To get the full price, (6/6) multiply 15x6 and you will get 90.
Ответ:
1.
C. The estimate is high because both factors are rounded up.
3.56 and 8.3 is rounded as 4*9. Rather it should have been rounded up like = 3.56 to 4 and 8.3 to 8 ; making =32
2.
Gasoline costs $3.65 a gallon. Round this to $4. To find the estimated cost of 14.2 gallons of gasoline, round this to 14.
So, cost becomes = = $56
Option D is correct.
3.
Stu plans for the patio to be 12.5 feet by 18.3 feet.
Actual area becomes = = 228.75 square feet
He orders enough brick for 247 square feet. Means he rounded off 12.5 to 13 and 18.3 to 19. Making sq feet.
The correct option is A. Stu estimated correctly by rounding up. He ordered enough brick. The exact area is 228.75 square feet.
4.
Velvet fabric costs $11.49 a yard. Yvette buys 9.3 yards
Rounding 11.49 to 11.50 and 9.3 to 9, we get or $104.
Option C is correct.
5.
As the values are rounded up and not down, the cost will be under $35. So, correct answer is option D .In step 4, he should have concluded the cost would be under $35.00
6.
$6.95 is rounded down to 6 and 9.5 is down to 9. This gives 54 which is too low. Rather it should be rounded up like $6.95 to 7 and 9.5 to 10 making it 7*10=70. So, option D is correct.
D.Sarah rounded $6.95 and 9.5 down. Her estimate of $54 is too low.
7.
Manuel buys 7.9 pounds of strawberries. Each pound costs $3.89.
Now rounding 7.9 to 8 and 3.89 to 4 , we get the best estimate. So, option A 8*4 is correct.
8.
The kitchen floor measures 11.3 feet by 9.25 feet.
The actual area is = sq feet. But Kerrie had ordered tiles for only 99 sq feet which is very less. So, she estimated wrongly by rounding down the values. So, the correct answer is option D.
D. Kerrie did not estimate correctly by rounding down. She does not have enough tile. The exact area is 104.5 square feet.