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

1 answer:

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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Evaluate the expression 263 + 5 when b = 3. 263 +5 = 2(3): +5 =

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

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

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

$2b^3+5=54+5$

$2b^3+5=59$

Therefore, the value of given expression at $b=3$ is 59.

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Veseljchak [2.6K]

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An ounce of milk contains 20 milligrams of calcium and 60 micrograms of vitamin A.

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.

Calcium:

20x milligrams in milk

40y milligrams in orange juice

2,200 milligrams in total

Hence,

$20x+40y=2,200$