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PilotLPTM [1.2K]
3 years ago
11

Plz helpppp fast plzzzzz Write the sum using summation notation, assuming the suggested pattern continues. -3 + 6 + 15 + 24 + ..

. + 132. a) summation of negative 27 times n from n equals 0 to infinity b) summation of negative 27 times n from n equals 0 to 15 c) summation of the quantity negative 3 plus 9 n from n equals 0 to infinity d) summation of the quantity negative 3 plus 9 n from n equals 0 to 15
Mathematics
1 answer:
Olin [163]3 years ago
6 0

Answer:

It is the first choice.

Step-by-step explanation:

This is a sequence where

the next term is obtained by adding 6.

first term = -9 + 6(0) = -9

second term = -9 + 6(1) = -3

third term = -9 + 6(2) = 3

4th term = -9 + 6(3)  = 9  

and 81 = -9 + (6*15).

So the answer is  Sigma (-9 + 6n)  from n= 0 to n = 15.

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Find the values of x and y for which the lines are parallel.
bearhunter [10]
The answer:  " x = 68, y = 72 " .
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Explanation:
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46 + (x - 3) + (y - 3) = 180 .

46 + 1(x - 3) + 1(y-3) = 180 .

46 + 1x - 3 + 1y - 3 = 180 .

46 - 3 - 3 + 1x + 1y = 180 .

40 + x + y = 180 ;

Subtract "40" from EACH SIDE of the equation:
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 40 + x + y - 40 = 180 - 40 ;

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Now:

Since:  "x + y = 140" ;

Let us plug in our known value, "68" ;  for "x" ;

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   x + y = 140 ;
 
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   y + 68 - 68 = 140 = 68 ;

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So,  solve for "x" and "y".

x = 68, y = 72 .
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Step-by-step explanation:

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