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fiasKO [112]
3 years ago
13

Greatest common factor of 21,28

Mathematics
2 answers:
ladessa [460]3 years ago
6 0

Answer:

7

Step-by-step explanation:

To find the GCF, or greatest common factor, of a set of numbers, we should list out each of their factors.

21: 1, 3, 7, 21

28: 1, 2, 4, 7, 12, 28

After listing them out, we can tell that 7 is the greatest number that are in both of these lists.

21: 1, 3, 7, 21

28: 1, 2, 4, 7, 12, 28

So, 7 is the GCF of 21 and 28.

Please mark as Brainliest! :)

Musya8 [376]3 years ago
5 0
The greatest common factor is 7.
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larisa86 [58]

Answer:

e = 13\sqrt{2}

f = 13\sqrt{2}

Step-by-step explanation:

The ∆ given is an isosceles ∆ with a right angle measuring 90°, and two congruent angles measuring 45° each.

Using trigonometric ratio formula, we can find the lengths of the missing side as shown below:

Finding e:

sin(\theta) = \frac{opp}{hyp}

sin(\theta) = sin(45) = \frac{\sqrt{2}}{2}

hyp = 26

opp = e = ?

Plug in the values into the formula

\frac{\sqrt{2}}{2} = \frac{e}{26}

Multiply both sides by 26

\frac{\sqrt{2}}{2}*26 = \frac{e}{26}*26

\frac{\sqrt{2}}{2}*26 = e

\frac{\sqrt{2}}{1}*13 = e

13\sqrt{2} = e

e = 13\sqrt{2}

Since side e is of the same length with side f, therefore, the length of side f = 13\sqrt{2}

3 0
3 years ago
Find the area of the polygon. A = __ft squared
Nataliya [291]

Answer:

28.5^2

Step-by-step explanation:

The formula is, b(base)+c(height)= b+c over 2.  b+c/2.

B=19ft in this problem.

C=38ft

Knowing this, we can further simplify.

19+38/2

Now, we add 19 and 38.

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57/2= 28.5

So, the anwser is 28.5^2

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3 years ago
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I hope this satisfies you.
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olganol [36]
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3 years ago
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laiz [17]

Answer:

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Step-by-step explanation:

We can use the leg rule to find y

hyp      leg

----- = -------

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7 0
3 years ago
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