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ANTONII [103]
3 years ago
8

A multiple-choice test consist of 100 questions. A correct answer is worth two marks, while an incorrect answer is worth -1 mark

s, if a student receives a score of 80, how many questions of the student answer incorrectly
Mathematics
1 answer:
user100 [1]3 years ago
3 0

Answer:

40

Step-by-step explanation:

if each question correct is worth two points, then the total points is 200. multiply the actual score by two to make the wrong answers equal the right answers, and then subtract it from 200. it should come out to look like 80*2=160\\200-160=40

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adoni [48]

Answer:

m = (6-5)/(4-1)

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3 years ago
Choose all the numbers that are common multiples of 3 and 12.
spayn [35]
<h3>Answers: 48 and 72</h3>

=========================================================

Explanation:

The number 12 is a multiple of 3 because 3*4 = 12.

So when looking for common multiples of 3 and 12, we simply need to look at multiples of 12.

The multiples of 12 are:

  • 12, 24, 36, 48, 60, 72, 84, 96, 120, ...

We see that 48 and 72 are on the list. The values 21, 27, 63, 81 are not on the list, so cross them out.

Now we could keep that list of multiples going to see if 844 is on there or not. A better method is to divide 844 over 12. If we get a whole number, then it's a multiple of 12.

844/12 = 70.333 approximately.

This shows that 844 is <u>not</u> a multiple of 12. So we cross 844 from the list.

Only 48 and 72 are multiples of 12 (and also multiples of 3).

6 0
3 years ago
Write an equation in standard form of the line that passes through the given point and the given slope. (-9, -4); m = -1/3
tigry1 [53]
<h2>Answer:</h2>

First, we must determine <u><em>b</em></u> using <u><em>slope-intercept form*</em></u>, the given point, and the given slope.

-4 = -\frac{1}{3}(-9) + b\\\\-4 = -3 + b\\\\-1 = b

Second, we need to set up the equation of the line in slope-intercept form.

y = -\frac{1}{3}x - 1

Third, we convert the above equation to <em>STANDARD FORM**</em>.

y = -\frac{1}{3}x - 1\\\\\frac{1}{3}x + y = -1

We now have our equation: \frac{1}{3}x - y = -1

*Slope-intercept form: <em>y = mx + b</em>

**Standard form: <em>ax + by = c</em>

3 0
3 years ago
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boyakko [2]

Answer:

1. 279,936

2. 727

4. 4,096

3 0
3 years ago
Read 2 more answers
A gaming console that is $300 plus 8% tax. What is the final cost of the console? (Round to the nearest cent)​
katrin2010 [14]

Answer: $324.00

Step-by-step explanation:

Convert 8% to decimals. You can do this by dividing by 100

\frac{8}{100}=0.08

Calculate 8% of 300 (0.08*300) and add 300 (+300)

0.08(300)+300\\24+300\\324

8 0
3 years ago
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