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Alexus [3.1K]
3 years ago
9

Stephen paid $340 for a $320 sofa. The extra amount was for tax. What was the percentage of tax for the sofa?

Mathematics
1 answer:
goldenfox [79]3 years ago
3 0
340-320 means 20 dollars for tax. Next we need to figure out what percent of 320 is 20 so we do 20/320 = .0625 so its 6.25% for tax... to check the problem do 320 x .0625 and it  equals 20.
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ExtremeBDS [4]

Given:

The expression is:

2b^3+5

To find:

The value of the given expression when b=3.

Solution:

We have,

2b^3+5

Substituting b=3 in the above expression, we get

2b^3+5=2(3)^3+5

2b^3+5=2(27)+5

2b^3+5=54+5

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vova2212 [387]

Answer:

10 ounces of milk and 50 ounces of orange juice

Step-by-step explanation:

Let the amount of milk be x ounces and the amount of orange juice be y ounces.

1. An ounce of milk contains 20 milligrams of calcium and 60 micrograms of vitamin A. Then x ounces of milk contain 20x milligrams of calcium and 60x micrograms of vitamin A.

2. An ounce of orange juice contains 40 milligrams of calcium and 10 micrograms of vitamin A. Then y ounces of orange juice contain 40y milligrams of calcium and 10y micrograms of vitamin A.

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60x micrograms in milk

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60x+10y=1,100

Solve the system of two equations:

\left\{\begin{array}{l}20x+40y=2,200\\ \\60x+10y=1,100\end{array}\right.

Divide each equation by 10:

\left\{\begin{array}{l}2x+4y=220\\ \\6x+y=110\end{array}\right.

From the second equation:

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Answer:

Step-by-step explanation:

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