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BabaBlast [244]
3 years ago
8

A student earned 23 out of 30 points on a quiz. What percent of the points did the student earn?

Mathematics
1 answer:
german3 years ago
4 0
Hi!

We can set up a proportion to answer this.

\frac{23}{30}  \frac{x}{100}

To solve for x, cross-multiply.

23 x 100 = 2300
2300/30 = 76.67

The answer is 76.67%

Hope this helps! :)
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Answer:

x=20; y=50 or (20, 50)

Step-by-step explanation:

Substitution means plugging in one variable's value that consists of the opposite variable. Because y=3x-10 is already specified, you can plug it into the second equation's y value. After doing that, it looks like this:

-4x+2y=20→-4x+2(3x-10)=20

Then you would distribute the 3 across the parentheses next to it, like this:

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Then, add like terms, like this:

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Then divide both side by 2 to isolate x.

x=20

Now, you can plug 20 (x) into either equation, but the first one seems simpler so you would pick that. It would look like this:

y=3x-10→y=3(20)-10

Solving would look like this:

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Answer:

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Step-by-step explanation:

Given that Chan deposited money into his retirement account that is compounded annually at an interest rate of 7%.

We know that there are 4 quarters in 1 year.

So to find that equivalent quarterly we will divide given yearly rate by number of quarters.

That means divide 7% by 4.

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But that is different than Chan's though of 2% quarterly interest.

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Answer:

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Step-by-step explanation:

ΔABC and ΔFDE are congruent by the postulate SSS

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