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2 years ago

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Mathematics

1 answer:

gtnhenbr [62]2 years ago

6 0

Answer:I'm pretty sure it's A

Step-by-step explanation:

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And DVD cost $26.75 before sale tax sale tax is 7.5% what is the total of cost of DVDs

blondinia [14]

First let's convert 7.5% into a decimal by doing Beyoncé on it and move the decimal two places to the left.

$7.5\% = 0.075$

Now let's multiply the cost of the DVD by the converted percent,

$26.75 \times 0.075 = 2.00$
Now let's add the above number to the original price, remember, $2 is not exact.

$26.75 + 2.00 = 28.75$
~~

I hope that helps you out!!

Any more questions, please feel free to ask me and I will gladly help you out!!

~Zoey

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3 years ago

Solve 4/7- (-4/7)<br>A. 8/7<br>B.-8/7<br>C.-4/7<br>D.4/7

mart [117]

Answer:

A. 8/7

Step-by-step explanation:

4/7 - (-4/7) --> 4/7 + 4/7

The two minutes turn into a plus, removing the bracket.

4/7 + 4/7 = 8/7

Add the two fractions together.

3 0

1 year ago

Read 2 more answers

A student has a 2% salt water solution and a 7% salt water solution. To best imitate salt water at a local beach, he needs 1 lit

FromTheMoon [43]

Let

x-------> the amount of $2\%$ solution

y--------> the amount of $7\%$ solution

we know that

$2\%=0.02\\7\%=0.07\\3.5\%=0.035$

$x+y=1$

$y=1-x$ -------> equation A

$0.02x+0.07y=0.035$ -------> equation B

substitute equation A in equation B

$0.02x+0.07(1-x)=0.035$

$0.02x+0.07-0.07x=0.035$

$0.05x=0.035$

$x=0.7\ liters$

find the value of y

$y=1-x$

$y=1-0.7=0.3\ liters$

therefore

The student need $0.7\ liters$ of $2\%$ solution and $0.3\ liters$ of $7\%$ solution

<u>the answer is</u>

A) The percent values were written incorrectly in the equation

B) The amount of 7% solution should be written as 1 – x, not x – 1.

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2 years ago

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Explain how, in general, riemann sum approximations to the area of a region under a curve change as the number of subintervals

Lyrx [107]

As you increase the subintervals the area will be closer and closer to the real value. In other words your approximation gets better.

As you increase the intervals, there will be more rectanagles and the added area of these rectangles are converging towards the actual area under the curve.

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3 years ago

Select the correct answer

White raven [17]

Answer:

Step-by-step explanation:

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2 years ago