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Oksi-84 [34.3K]
2 years ago
14

A grocer has two kinds of candies: one sells for 90 cents per pound and the other sells for 40 cents per pound. How many pounds

of each kind must he use to make 100 pounds he can sell for 85 cents per pound?
Mathematics
1 answer:
Vladimir [108]2 years ago
3 0

100(.85)=x(.9)+(100-x)(.4)
85=.9x+40-.4x 
45=.5x 
x=90

Thus 90lbs of the 90 cent and 10lbs of the 40 cent. 
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You split $1500 between two savings accounts one pays 4%interest and the other pays 5% after one year you have earned $69.50 in
ANTONII [103]

Answer:

Step-by-step explanation:

Use the basic simple interest formula:

P * r * t = I and put the info into a table with those variables along the top, formig the columns we need:

                   P       *       r       *       t      =       I

Acct 1

Acct 2

If we have a total of 1500 to split up between 2 accounts, we put x amount of money into one and then have 1500-x left to put into the other.  We will fill those in along with the interest rates in decimal form and the time of 1 year:

                   P        *        r        *        t        =        I

Acct 1           x               .04                1

Acct 2     1500-x          .05                 1

Looking at the formula we are told that Prt = I, so we will multiply P times r times t and fill in the I column:

                  P        *        r        *        t        -        I

Acct 1         x                 .04              1               .04x

Acct 2    1500-x           .05               1          .05(1500-x)

The total Interest earned by the addition of the interest earned from both accounts is 69.50.  So we add the interest column together and set it equal to 69.50:

.04x + .05(1500 - x) = 69.50 and

.04x + 75 - .05x = 69.50 and

-.01x = -5.5 so

x = 550

That's how much money is in the account earning 4% interest.

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2 years ago
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Answer:

162

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The number with "1" digit starts with 101 then 110 and so on.

6 0
3 years ago
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Naily [24]

Answer:

The total number of registered doctors was 167,722.

Step-by-step explanation:

Total number of doctors:

The total number of doctors is given by x.

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This means that:

0.316x = 53000

What was the total number of registered doctors?

We have to solve the above equation for x. So

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Answer:

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Answer:

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3 years ago
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