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krok68 [10]
3 years ago
5

Can odd numbers under 20 be composite numbers

Mathematics
1 answer:
slavikrds [6]3 years ago
7 0
Yes, the only odd composite numbers below 20 are 9 and 15.

9 can be divisible by 1,3, and itself
15 can be divisible by 1,3,5, and itself
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1 4/5+ 2 2/3=what<br><br> 5 7/8 - 3 1/2=what<br> 1 1/2+ 3 1/5=what<br> 7 5/6- 5 1/2=what
lilavasa [31]

Answer:

1.) 4 7/15

2.) 2 3/8

3.) 4 7/10

4.) 2 1/3

Step-by-step explanation:

1.) 1 4/5 + 2 2/3

3 + 4/5 + 2/3

LCD = 15

3 + 12/15 + 10/15

3 + (12 + 10)/15

3 + 22/15

3 + 1 7/15

4 7/15

2.) 5 7/8 - 3 1/2

(5 x 8 + 7)/8 - 3 1/2

47/8 - 3 1/2

47/8 - (3 x 2 + 1)/2

47/8 - 7/2

LCD = 8

47/8 - 28/8

19/8

2 3/8

3.) 1 1/2 + 3 1/5

4 + 1/2 + 1/5

LCD = 10

4 + 5/10 + 2/10

4 + (5 + 2)/10

4 7/10

4.) 7 5/6 - 5 1/2

(7 x 6 + 5)/6 - 5 1/2

47/6 - 5 1/2

47/6 - (5 x 2 + 1)/2

47/6 - 11/2

LCD = 6

47/6 - 33/6

(47 - 33)/6

14/6

7/3

2 1/3

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3 years ago
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earnstyle [38]

Answer: increase

Step-by-step explanation:

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Step-by-step explanation:

The diameter is always twice as large as the radius so divide the diameter by 2 and you'll get the radius.

20 ÷ 2 = 10

Hope this helps! :D

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