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Margarita [4]
3 years ago
13

Please help me thank you

Mathematics
1 answer:
Lunna [17]3 years ago
8 0

Answer:

      418

Sn = ∑ 3 +4(n-1)

     n=1

Step-by-step explanation:

3,7,11,15,.....1671

a1 =3

d = 4  (7-3=4)

an = a1 + d(n-1)

an = 3 +4(n-1)

We need to determine the last term

1671 = 3 +4(n-1)

Subtract 3

1671-3 = 3-3 +4(n-1)

1668 = 4(n-1)

divide by 4

1668/4 = 4(n-1)/4

417 = n-1

Add 1 to each side

418 = n

      418

Sn = ∑ a1 +d(n-1)

     n=1

      418

Sn = ∑ 3 +4(n-1)

     n=1

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3 years ago
I’m struggling to answer this question on my test, can someone explain it to me?
Flauer [41]
Correct answer is Option A: 18/48 = 21/56

You’ll have to divide the numerator by the denominator of each fraction to see whether they have the same quotient:

18/48 = 0.375
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The other options are not proportional.

B) 20/28 = 15/18:

20/28 = 0.714
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Thus, 20/28 ≠ 15/18

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3/5 = 0.6
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Thus, 7/10 ≠ 10/7

These solutions prove that the correct answer is A) 18/48 = 21/56

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4 0
3 years ago
What's the answer ????????
Salsk061 [2.6K]
I hope this helps you

8 0
3 years ago
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Find the length of each arc<br> r=13 ft x=90 degrees
VladimirAG [237]

Answer:

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Then you find the ratio:

The length of the arc is 90/360, which is 1/4, of the circumference.

Finally, find the length of the arc:

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I hope this helps :)

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