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lisabon 2012 [21]
3 years ago
10

Fred paid $75 for a pack of 15 toy mice. How much did each mouse cost?

Mathematics
2 answers:
Oksana_A [137]3 years ago
8 0

Answer: 5 dollars

Step-by-step explanation:

75/15 = 5

morpeh [17]3 years ago
7 0
75 divided by 15 equals 5 so each mouse cost $5.
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The population of bacteria doubles every 6 hours. By how much will it grow in three days. Write the equation
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Step-by-step explanation:

let x be the population

so we have ,

2x= 6h

?= 3 days or 3×24h

by cross multiplication we have

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Step-by-step explanation:

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2 years ago
Each weekday Davina rides her bike from her house to school. After school, she rides to the library. Then Davina takes the same
marin [14]

Answer:

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Step-by-step explanation:

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3 0
2 years ago
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Catarina and Tom want to buy a rug for a room that is 9 by 19 feet. They want to leave an even strip of flooring uncovered aroun
oksano4ka [1.4K]

Answer:

17ft wide

Step-by-step explanation:

The room is 9 by 19ft

Length (x) = 19ft

Width(y) = 9ft

Area of the rug = 119ft^2

x*y = 119 ...........(1)

For the second equation we will make sure the strip around the room is uniform in size

9 - x = 19 - y

-x = 19 - 9 -y

-x = 10 - y

x = y - 10 ..........(2)

Put the value x in equation 1

(y - 10)y = 119

y^2 - 10y = 119

y^2 - 10y - 119 = 0

a = 1, b = -10, c= -119

Use quadratic formula to solve the equation

y = (-b +/-√b^2 -4ac) / 2a

y = [-(-10) +/- √ (-10)^2 - 4(1)(-119)] /2(1)

y = (10 +/- √100 + 476) /2

y = (10+/-√ 576 ) / 2

y = (10 +/- 24) / 2

y = (10 + 24) /2 or (10 - 24)/2

y = 34/2 or -14/2

y = 17 or -7

y = 17 ft

Recall that x = y - 10

x = 17 - 10

x = 7ft

5 0
3 years ago
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