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2 years ago

11

Find the value of x so that (x,-4) is on the line given by -2x + 3y = 6.

1 answer:

lord [1]2 years ago

6 0

Answer:

Step-by-step explanation:

-2x + 3y = 6.....(x, -4)...so y = -4

-2x + 3(-4) = 6

-2x - 12 = 6

-2x = 6 + 12

-2x = 18

x = -18/2

x = -9

so the value of x is -9.....(-9,-4)

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What is the sum of the geometric sequence −4, 24, −144, ... if there are 8 terms?

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Answer:

The sum of 8 geometric sequence is 959780

Step-by-step explanation:

We are given

this sequence is geometric

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First term is -4

so, $a_1=-4$

now, we can find common ratio

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we can use formula

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n=8

now, we can plug values

$S_8=-4(\frac{1-(-6)^{8}}{1+6} )$

now, we can simplify it

and we get

$S_8=959780$

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