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alina1380 [7]
3 years ago
13

Jeff bought 4 oranges and 7 apples for a total of $4.88. Gene bought 12 oranges and 8 apples for a total of $7.88. What is the c

ost of each orange and each apple?
Mathematics
1 answer:
rjkz [21]3 years ago
4 0
4x+7y=4.88 -> mult by -3 -> -12x-21y=-14.64
12x+8y=7.88
-12x-21y=-14.64
Add the two above equations together, the y will be left:
-13y=-6.76
y=0.52 —> cost of each apple (plug back into one of original equations, I chose 4x+7y=4.88:
4x+7(0.52)=4.88
Solve for x.
x=0.31 —> cost of each orange
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Answer:

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Step-by-step explanation:

-8 * ( 1/4) * (6)

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4 0
3 years ago
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A student theatre charges $9.50 per ticket. The theater has already sold 70 tickets. Write and solve an inequality that represen
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To make the inequality, we will use the ≥ sign to determine how many more tickets we will need. Before we write the inequality, let's see how much money was already made by the present tickets. 70 x 9.50 = $665.
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$665 + $9.50t ≥ $1000, subtract 665
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5 0
3 years ago
Adam is building a rectanglar swimming pool. The perimeter of the pool must be no more then 120 feet. If the length of the pool
jasenka [17]

Answer:

W\leq 38\ ft

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Step-by-step explanation:

Let

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W ---> The width of the rectangular pool

we know that

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P=2(L+W)

so

2(W+L)\leq 120 ----> inequality A

we have

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3 0
3 years ago
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creativ13 [48]

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Time = 12 moths = \frac{12}{12} = 1 year

Rate = R %

So, interest 1 = Principal * Time * Rate

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                   = 2000R

Now,

Principal 2 = 1000

Time = 12 moths = \frac{12}{12} = 1 year

Rate = R %

So, interest 2 = Principal * Time * Rate

                   = 1000 * 1 * R

                   = 1000R

Total interest to be paid = 2000R + 1000R

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Principal = 3000

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Rate = R %

Interest = Principal * Time * Rate

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