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pishuonlain [190]
3 years ago
11

A medium sized apple has 70 calories . This is 10 calories less than 1/4 of the calories in an old westie choclate bar. We need

to find out how many calories are in the choclate bar. Choose the best model for the first step in this problem
Mathematics
2 answers:
Ksenya-84 [330]3 years ago
6 0

Answer:

320 calories.

Step-by-step explanation:

It is given that a medium sized apple has 70 calories .

This is 10 calories less than 1/4 of the calories in an old westie chocolate bar.

Let the calories in an westie chocolate bar = x

Now we establish an equation and find the value of  x

\frac{1}{4}x - 10 = 70

\frac{1}{4}x = 70 + 10

x = 80 × 4

x = 320

An old wetie chocolate bar has 320 calories.

kupik [55]3 years ago
5 0

Answer:

An Old Westie chocolate bar contains 240 calories.

Step-by-step explanation:

If a medium sized apple has 70 calories and this is 10 calories less than 1/4 of an Old Westie chocolate bar, we must first find the difference between 70 and 10.

70 - 10 = 60

60 calories then is 1/4 of that of the chocolate bar, or, the chocolate bar is 4 times that of 60 calories

60 * 4 = 240

An Old Westie chocolate bar contains 240 calories.

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Answer:

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Step-by-step explanation:

A cant be right because the graph isn't a straight line.

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12 is 30% of ____ <br> (Please explain)
natka813 [3]

Answer:

40

Step-by-step explanation:

In word problems, the word "of" usually means multiply.  Thus, for example, 10% of $50 is $5.  This is because we can write 10% as 0.10 or as 10/100 (which is 1/10) and then multiply:    (1/10)(50) = 5

So, we often see equations like:

    R = (1/2)D        meaning R is 50% of D, or R is half of D

Let x = the number we want to find

This problem says:

 "12 is 30%       of    what number?"

  12 = (30/100) *        x

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(10/3)12 = x             [multiply both sides by (10/3)]

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Checking (very important):      

 Is   12 = (3/10)(40)    ?

       12 = (3)(4)    ?

       12 = 12     ? yes

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