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VladimirAG [237]
3 years ago
5

Which is point (-1, 2) on the graph? A. W B. X C. Y D. Z

Mathematics
1 answer:
Lelechka [254]3 years ago
5 0
It’s choice D. Z, hope that helps :)
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Find the exact sum of the arithmetic series <br><br> 6+3.8+⋯−29.2
matrenka [14]

Answer:

-197.2

Step-by-step explanation:

Since it is arithmetic series, first find the difference d between the two know series.

3.8 - 6 = - 2.2

d = -2.2

a = 6

Tn = -29.2

Looking for the n term, use the linear method.

Tn = a+( n - 1)d

Substitute all the parameters

-29.2 = 6+( n - 1 ) -2.2

-29.2 = 6 - 2.2n + 2.2

- 29.2 = 8.2 - 2.2n

-29.2 - 8.2 = - 2.2n

-37.4 = -2.2n

n = 37.4/ 2.2

n = 17 terms.

To Find the exact sum of the arithmetic series, use the sum formula below

Sm = n/2( 2a + (n - 1)d)

Sm = 17/2( 2 × 6 + ( 17 - 1 ) -2.2

Sm = 17/2(12 - 35.2)

Sm = 8.5( - 23.2)

Sm = - 197.2

Therefore, the exact sum of the arithmetic series is -197.2

5 0
3 years ago
30men can finish 1/7of a work in 2days.18men will do othe remaining work in ?
Dovator [93]
7/7-1/7=6/7 is the rest of work
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18 men takes 18*12/30= 7.2days
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3 years ago
Find the range of the data. 62, 58, 67, 57, 59, 70, 69,61 The range is<br>​
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Answer:

the range is 13

Step-by-step explanation:

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1/12 x

Step-by-step explanation:

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She... she read 1/2 of a page in 1 minute...
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