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notka56 [123]
3 years ago
12

How many integers between 1-100 are divisible by 3 or 5 or 7?

Mathematics
1 answer:
lina2011 [118]3 years ago
7 0
3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 96 99 = 33

5 10 20 25 35 40 50 55 65 70 80 85 95 100 = 14
7 14 28 49 56 77 91 98 = 8

So 55 numbers are divisible by 3 or 5 or 7. 
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Mario buys tickets for either 47 or 57 dollars. He purchases 14 tickets and spends 738 dollars. How many tickets did he purchase
Ivanshal [37]

Answer:

6 tickets were purchased at $47

8 tickets were purchased at $57

Step-by-step explanation:

Let the tickets purchased at $47 be x

Let the tickets purchased at $57 be y

We can form an equation from the question given which will be:

x + y = 14 ....... i

47x + 57y = 738 ........ ii

From equation i

x = 14 - y ........ iii

Substitute iii into ii

47x + 57y = 738

47(14-y) + 57y = 738

658 - 47y + 57y = 738

Collect like terms

-47y + 57y = 738 - 658

10y = 80

y = 80/10

y = 8

8 tickets were purchased at $57

Note that from i

x + y = 14

x + 8 = 14

x = 14 - 8

x = 6

6 tickets were purchased at $47

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2 years ago
Which pair of angles are supplementary?
Lina20 [59]

Supplementary angles are angles that add up to 180 degrees, aka one straight line. The supplementary angles here are:

1 and 2, 1 and 3, 2 and 4, 3 and 4, 5 and 6, 6 and 8, 7 and 8, and 6 and 7. Well, those are the more obvious ones. 1 and 7 are supplementary because if you envision them next to each other, you’ll see that they create a straight line. So, with that logic, 3 and 5 are supplementary because when you put them together, they create a straight line

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3 years ago
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ser-zykov [4K]

Answer:

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Read 2 more answers
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Answer:

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Step-by-step explanation:

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Am I correct ?<br> ( √2 - √3 )² =1 - √2
Arturiano [62]
You are not correct, the right answer should be 5-2 square root symbol. I couldn't find out how to put one there.
4 0
3 years ago
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