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leva [86]
3 years ago
10

Peggy was taking a timed 30-question test. She was able to correctly answer 80% of the questions but had to skip the rest. How m

any questions did Peggy answer correctly?
A.
14
B.
6
C.
24
D.
16
Mathematics
1 answer:
irinina [24]3 years ago
7 0
To find the percentage of a number, first, convert it to a decimal and then multiply. 

To convert a percentage to a decimal, move the decimal point over 2 spaces to the left. That makes 80% = 0.80

Then multiply 0.80 by 30.

0.80 • 30 = 24

Peggy got 24 questions correct.
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42×10 minutes in shower
andrew11 [14]
42 times 10 is 420 hope it helps you
3 0
3 years ago
PLEASE help what would it be?
sveticcg [70]

Answer: #8292829282

Step-by-step explanation:

3 0
3 years ago
A bag contains 9 marbles: 3 are green, 2 are red, and 4 are blue. Bob chooses a marble at random, and without putting it back, c
kvasek [131]

Answer: 1/18

Step-by-step explanation:

9 total marbles

2 red

so the first time he picks it would be a 2/9 chance of the marble being red

the second time there would be 8 total marbles and 2 red, so it would be a 2/8 or 1/4 chance.

the probability is found by doing 2/9*1/4 which equals 2/36 or 1/18.

8 0
2 years ago
It takes 12 men 5 days to complete a job. Work out how many days it would take 3 men to complete the same job.
frutty [35]

Answer:

20 days

Step-by-step explanation:

It takes 12 men 5 days to complete a job. Work out how many days it would take 3 men to complete the same job.

12 * 5 = 60

60/3 = 20

It will take 3 men 20 days to do the same job

3 0
2 years ago
If 2 is added to both the numerator and denominator of a fraction its value becomes half. If two is subtracted from both the num
Hitman42 [59]

Answer:

The original fraction is \frac{6}{14}.

Step-by-step explanation:

Solution,

Let the fraction be'\frac{x}{y}'.

Where 'x' is the numerator and 'y' is the denominator.

Now according to question, if 2 is added to both the numerator and denominator the value of the fraction becomes 1/2.

So, framing the above sentence in equation form, we get;

\frac{x+2}{y+2}=\frac{1}{2}

On using cross multiplication method, we get;

2(x+2)=y+2\\\\2x+4=y+2\\\\2x+4-2=y\\\\\therefore\ y=2x+2\ \ \ \ equation\ 1

Now according to question, if 2 is Subtracted to both the numerator and denominator the value of the fraction becomes 1/3.

So, framing the above sentence in equation form, we get;

\frac{x-2}{y-2}=\frac{1}{3}

On using cross multiplication method, we get;

3(x-2)=y-2\\\\3x-6=y-2\\\\3x-y=-2+6\\\\3x-y=4 \ \ \ \ equation\ 2

Now Substituting the equation 1 in equation 1 we get;

3x-y=4\\\\3x-(2x+2)=4\\\\3x-2x-2=4\\\\3x-2x=4+2\\\\x=6

Now Substituting the value of x in equation 1 we get;

y=2x+2\\\\y=2\times6+2 = 14

Hence The original fraction is \frac{6}{14}.

4 0
3 years ago
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