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quester [9]
3 years ago
11

How many pounds of candy worth 70 cents a pound must be mixed with 30 pounds of candy worth 90 cents a pound to produce a mixtur

e which can be sold for 85 cents per pound?
A) 5 pounds
B) 10 pounds
C) 15 pounds
D) 12 pounds
Mathematics
1 answer:
Svet_ta [14]3 years ago
5 0
<h3>Answer:</h3>

B) 10 pounds

<h3>Explanation:</h3>

Let x represent the amount of 70¢ candy to be added. The value of the mixture can be written as ...

... 90×30 + 70x = 85×(30+x) . . . . . where 30+x is the total weight of the mix

... 2700 +70x = 2550 +85x

... 150 = 15x . . . . . . add -70x-2550

... 10 = x . . . . . . . . . divide by the coefficient of x

10 pounds of candy at 70¢/lb must be added.

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Step-by-step explanation:

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y: (-1 + 7)/2 = 3

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Let x=annual interest rate of 18000 investment.
Then
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the annual interest rate of the 18000 investment is 6.6%
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What is the approximate area of the shaded region? Circumscribed square with side length 8 meters. The four regions between the
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13.76 square meters

Step-by-step explanation:

The side of square is 8 meters.

So, the diameter of circle = 8 meters.

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                        = 8 × 8 - π × 4 × 4                {∵ π = 3.14 or 22÷7}

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300 people rejected part A and part B.

Step-by-step explanation:

First let's review the information given by the statement of the exercise.

1000 people surveyed.

600 reject part A, 500 part B and 200 reject no one. Therefore, of those 1000, 800 reject a party, either A or B, since 1000 respondents - 200 who do not reject = 800 who reject.

Among the respondents there are a total of 600 + 500 rejections, that is to say 1100 rejections in total.

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