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kenny6666 [7]
4 years ago
10

Francesca wants to start exercising to burn at least 1500 extra calories per? week, but she does not have much spare time for ex

ercise. According to a? website, she can burn an average of 3.5 calories per minute? walking, 4 calories per minute? cycling, and 8 calories per minute swimming. She would like her total time walking and cycling to be at least 3 times as long as she spends swimming. She would also like to walk at least 20 minutes per week. How much time should she spend on each activity not only to meet her goals but also to minimize her total exercise time per? week? What is her minimum exercise time per? week?
Mathematics
1 answer:
slega [8]3 years ago
7 0

Answer:

96.25 calories every 20 minutes

Step-by-step explanation:

i am not 100 sure but it seems she spents 5 minutes swimming and 15 minutes walking and cycling 5*8=40     7.5*4= 30      7.5*3.5=26.25

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3 years ago
A cone-shaped container has a height of 9 in. and diameter of 2 in. It is filled with a liquid that is worth $2 per cubic inch.
ELEN [110]
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4 years ago
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4 years ago
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anzhelika [568]

Answer:

Each muffin= 1.5; Each quart of milk= 3

Step-by-step explanation:

Let m represent muffins and q quarts of milk, so

8m+2q=18

3m+1q=7.50

*solve*

3m+1q=7.5

    -1q    -1q

3m=-1q+7.5

/3     /3   /3

m=-1/3q+2.5

*replace for m*

8(-1/3q+2.5)+2q=18

-2 2/3q+20+2q=18

-2/3q+20=18

         -20 -20

-2/3q=-2

/-2/3  /-2/3

q=3

*replace to find m*

3m+1(3)=7.50

3m+3=7.5

      -3  -3

3m=4.5

/3     /3

m=1.5

*replace to verify*

8m+2q=18

8(1.5)+2(3)=18

12+6=18

18=18

3m+1q=7.50

3(1.5)+1(3)=7.5

4.5+3=7.5

7.5=7.5

8 0
2 years ago
What do the following two equations represent -4-4y=-5 4x-4y=1
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Step-by-step explanation:

Get the value of y first from the first equation.. Replace the value of y on the second equation to get the value of x

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3 years ago
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