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3 years ago

Find the first term of the arithmetic sequence in which a38= -5 and the common difference is -2.9

Mathematics

2 answers:

lana66690 [7]3 years ago

8 0

Answer: 102.3 Hope that helps

mestny [16]3 years ago

3 0

Answer:

102.3

Step-by-step explanation:

a_38 = -5

difference d= -2.9

We use general formula

$a_n = a_1 + (n-1)d$

WE make the formula for a_38 th term

Plug in 38 for n

$a_{38} = a_1 + (38-1)d$

Now plug in -2.9 for d and -5 for a_38

$-5 = a_1 + (38-1)(-2.9)$

$-5 = a_1 - 107.3$

Now add 107.3 on both sides

102.3 = a_1

option A is correct

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Answer:

Part A

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If jane purchased exactly 4 shirts she must have purchased Exactly ___ skirts. (round to the nearest tenth)

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3 years ago

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2 years ago

Solve x^2 +14x=15 by completing the square

ivanzaharov [21]

Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

David had $35 to spend at the fair. If the admission to the fair is $4.5 and the rides cost $1.50 each, what is the greatest num

sleet_krkn [62]

Answer:

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Step-by-step explanation:

35-4.5=30.5

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3 years ago