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Daniel [21]
3 years ago
8

a student correctly answered 80% of the 2o questions on the test How many questions did the student answer correctly

Mathematics
2 answers:
NeX [460]3 years ago
4 0
16 questions right is the answer




Zigmanuir [339]3 years ago
4 0
He answered four incorrectly and 16 correctly
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How many solutions does the system of equations below have?
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Answer:

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Step-by-step explanation:

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3 years ago
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Lisa took out a loan for 5 months and was charged simple interest at an annual rate of 4.8%.
denis-greek [22]

Answer:

<em>Lisa borrowed $8,500</em>

Step-by-step explanation:

<u>Simple Interest </u>

Occurs when the interest is calculated on the original principal of a loan only.

Unlike compound interest where the interest earned in the compounding periods is added to the old principal, simple interest only considers the principal to calculate the interest.

The interest earned is calculated as follows:

I=Prt

Where:

I = Interest

P = initial principal balance

r = interest rate

t = time

Lisa took out a loan for t=5 months and was charged simple interest at an annual rate of r=4.8% = 0.048. She paid interest for I=$170.

We need to convert the time to years (there are 12 months per year):

t = 5 /12 years.

The formula must be solved for P:

\displaystyle P=\frac{I}{rt}

Substituting:

\displaystyle P=\frac{170}{0.048*5/12}

\displaystyle P=\frac{170}{0.02}=8,500

Lisa borrowed $8,500

8 0
2 years ago
Eddie has saved up $45 to purchase a new camera from the local store. The sales tax in his county is 7% of the sticker price. Wr
Papessa [141]
<span>Let the price (before tax) be x. The tax is 7% of x, so it is 0.07x. The price plus the tax add up to $45. x + 0.07x = 45</span>
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3 years ago
What fraction would you add to 29/6 to make 4
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Keeping in mind that 29/6 is greater than 4, is actually 4 and 5/6, so the amount we'll "add" will be a negative one.

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Use x to represent any unknown number<br><br> The sum of 8 and a number is 22
sashaice [31]
8+x = 22

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