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ASHA 777 [7]
3 years ago
9

The first and last terms of a 10-term arithmetic series are listed in the table. What is the sum of the series?

Mathematics
2 answers:
JulsSmile [24]3 years ago
8 0

Answer:

b. 390

Step-by-step explanation:

a_1 =3\\a_n=75\\n=10\\\\use \ the \ arithmetic\  formula \\\\S_n=\frac{n}{2}(a_1+a_n)\\S_1_0=\frac{10}{2} (3+75)\\\\ \\S_1_0= 5 (78)\\\\S_1_0=390\\

USPshnik [31]3 years ago
3 0
The arithmetic sequence general formula is an = a1 + d *(n-1) where d is the arithmetic difference and n is an integer. In this case, upon derivation, the formula that represents the sum of the series is S = (a1  + an)*(n/2). Substituting, S = (3+75)*(10/2) equal to 390
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Step-by-step explanation:

Consider the provided information.

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Part (A) If it snows tonight, then I will stay at home.

Here p is If it snows tonight, and q is I will stay at home.

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Contrapositive: If I will not stay at home then it doesn't snows tonight.

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Part (C) When I stay up late, it is necessary that I sleep until noon.

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3 years ago
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Answer:

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3 years ago
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marta [7]

That's very interesting.  I had never thought about it before.
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-- 1:
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-- 2:
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-- 3:
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-- 4: 
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-- 5:
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-- 6:
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-- 7:
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-- 8:
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-- 9:
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So a number greater than 10 that IS a prime number COULD have
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It CAN't have a  0,  2,  4,  5,  6,  or  8 .

The only choice that includes all of the possibilities is  'A' .

4 0
3 years ago
Can someone please explain this to me please? Thank you : )
Ber [7]

Answer:

7/25

Step-by-step explanation:

if 7% are defective and they order 25% of their lightbulbs from Baker that will be your answer.

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