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Lilit [14]
2 years ago
5

How many pounds of candy worth $8 per lb. should be mixed with 100 lb. of candy worth $4 per lb. to get a mixture that can be so

ld for $7 per lb.?
Mathematics
1 answer:
Gwar [14]2 years ago
5 0

Answer:

300 lbs

Step-by-step explanation:

Let x be the number of pounds of candy worth $8 per lb mixed

Now we have total pounds = 100+x

Value of the mixture = 100(4)+8x = 8x+400

Since 7 per lb to be sold out we get

\frac{8x+400}{100+x} =7\\8x+400 = 700+7x\\x=300

300 lbs should be mixed

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ioda

Answer:

An unknown variable by reversing the process used to form the original equation.

Step-by-step explanation:

The opposite process rule says to solve for - an unknown variable by reversing the process used to form the original equation.

If an equation indicates an operation such as addition, subtraction, multiplication, or division, solve for the unknown variable by using the opposite process.

For example:

Lets say we have to find x+25=35

Here 25 is subtracted from both sides of the equation to isolate x.

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2 years ago
1. whats the midpoint between (7,3) and (-3,-1)
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Answer:

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Step-by-step explanation:

Given endpoints (x₁, y₁ ) and (x₂, y₂ ) then the midpoint is

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Here (x₁, y₁ ) = (7, 3) and (x₂, y₂ ) = (- 3, - 1) , then

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3 years ago
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Jeri is 3 years younger than Laura, whose age is x. How old is Jeri? x - 3 yrs old x + 3 yrs old 3x yrs old
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