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3 years ago

What is the sum of the first 20 terms of the series below?

Mathematics

2 answers:

Evgesh-ka [11]3 years ago

7 0

the sum of the first 20 terms of the series below is C.

Natalija [7]3 years ago

6 0

Answer:

Step-by-step explanation:

Now to find the sum of first 20 terms, substitute n=20,a=−1 and d=4 in S n = 2n [2a+ (n−1)d] as follows: S 20 = 220 [(2×−1)+(20−1)4]=10[−2+(19×4)]=10(−2+76)=10×74=740 Hence, the sum of first 20 terms is 740.

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Luke sold 4 times as many books as Maurice. If Maurice had sold 18 more books, he would have tied Luke for first place. How many

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Answer:

Step-by-step explanation:

I guessed and checked but 24 -18 is 6 and 6 times 4 is 24

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3 years ago

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Which is a factor of 5xy − 40x − 15y + 120? <br> A. 2 <br> B. y − 8 <br> C. x − 4 <br> D. x + 6

Phantasy [73]

Upon slight rearranging:

5xy-15y-40x+120, now factor 1st and 2nd pair of terms

5y(x-3)-40(x-3) which is equal to:

(5y-40)(x-3) if we factor the first parenthetical term as well

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3 years ago

( PICTURE PROVIDED)

12345 [234]

Answer:

2x + 2x+2 = 3x + 1

4x + 2 = 3x + 1

Subtract 3x from both sides

4x - 3x + 2 = 3x - 3x + 1

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Hope this helped!!!

~Shane

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3 years ago

Ethan rolls the number cube and then spins the arrow on the

alisha [4.7K]

Answer:

<h2>I myself would say the answer is C.</h2>

Step-by-step explanation:

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3 years ago

The price per share of stock when the stock market opened on Tuesday was $4.52. The price per share of stock when the stock mark

hjlf

Answer:

From Tuesday to Thursday, the total change in the value of the stock was $-0.36.

There are 3 days from the opening of the stock market on Tuesday and the close of the stock market on Thursday.

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3 years ago

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