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mina [271]
2 years ago
7

What is the greatest common factor of 15 and 21?​

Mathematics
2 answers:
Fudgin [204]2 years ago
6 0

Answer:

3

Step-by-step explanation:

PIT_PIT [208]2 years ago
3 0
Greatest common factor (GCF) of 15 and 21 is 3. We will now calculate the prime factors of 15 and 21, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15 and 21.
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Which number should follow in this series: 64/64 9/12 6/12​
zheka24 [161]

Answer: \frac{1}{4}

Step-by-step explanation:

You can reduce the fractions, then:

\frac{64}{64}=1

\frac{9}{12}=\frac{3}{4}

\frac{6}{12}=\frac{3}{6}=\frac{1}{2}

Rewrite them as following:

1,\frac{3}{4},\frac{1}{2}

If you subtract the first number and the second number, you obtain:

1-\frac{3}{4}=\frac{1}{4}

 If you subtract the second number and the second number, you obtain:

\frac{3}{4}-\frac{1}{2}=\frac{1}{4}

Therefore, you must subtract \frac{1}{2} and \frac{1}{4} to obtain the number asked. Then, this is:

\frac{1}{2}-\frac{1}{4}=\frac{1}{4}

6 0
3 years ago
Read 2 more answers
Which one is the right answer?
azamat

Answer:

D

Step-by-step explanation:

First of all, i mean A and B are out first thing because you don't have enough information to find out if it's true.

C is incorrect because as stated before, not enough information.

<u><em>However,</em></u>

You know that the angles 1-8 are all supplementary, which means that 1 and 2 can be added to make 180 degrees, as so can 3 and 4, 3 and 1. 2 and 4, blah blah blah.

In D, the angles that are being added are supplementary, because the three lines making up that weird figure is adjacent and is parallel to each other.

If you give one of the angles a degree, you know that 180-x with x being that degree, will equal the other angle on the other side of the lines.

Therefore its D.

Edit:

I just realized that theres an angle stated at the top of the screen. Still with that angle given, A and B is incorrect and the answer is still D.

3 0
3 years ago
Write n+6 in a word phase
Delvig [45]
The sum of a number and 6.

Or

The sum of n and 6
7 0
3 years ago
What are factors of 50
Len [333]

50 = 1*50

50 = 2* 25

50 = 5* 10

the factors of 50 = 1,2,5,10,25, 50

4 0
3 years ago
Read 2 more answers
Please help. You dont have to show work.
g100num [7]
%error=100(estimate-actual)/actual

%e=100(50-40)/40=25%

can't see the whole question but...

40(60/100)=24

so 24/40=3/5 carry a phone.

24 students carry a phone.
8 0
3 years ago
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