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NNADVOKAT [17]
3 years ago
13

Will give brainliest worth 50 points also i need it done today pls

Mathematics
2 answers:
Elden [556K]3 years ago
6 0

Answer:

5/2

Step-by-step explanation:

we have X = -3x + 3

-3x +3= -2

3+2 = 3x

5= 3x

5/3 = x

Marianna [84]3 years ago
5 0

#1

18,11,4,-3...

Here

  • a=18
  • d=-7

\\ \sf\longmapsto a_n=a+(n-1)d

\\ \sf\longmapsto a_{32}

\\ \sf\longmapsto 18+31(-7)

\\ \sf\longmapsto 18-217

\\ \sf\longmapsto -199

#2

  • a=4
  • d=6

\\ \sf\longmapsto a_{24}

\\ \sf\longmapsto a+23d

\\ \sf\longmapsto 4+23(6)

\\ \sf\longmapsto 4+138

\\ \sf\longmapsto 142

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Answer:

Below in bold

Step-by-step explanation:

The sequence is:

3, x, y, 18

If this is an A P then

x - 3 = y - x  

2x - y = 3      (A)  and

y - x = 18 - y

2y - x = 18      (B)

Multiply  (A) by 2:

4x - 2y = 6    (C)

Adding B and C:

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x = 8.

and

2y - 8 = 18

2y = 26

y = 13.

So x = 8 and y = 13.

b)   ar + ar^2 = 6ar^3  where a = first term and r = common ratio

Divide by a:

r + r^2 = 6r^3

6r^3 - r^2 - r = 0

r(6r^2 - r - 1) = 0

r(3r  + 1)(2r  - 1) = 0

So the 2 possible values of r

= -1/3 and 1/2.

i) The common ratio is positive so it must be 1/2.

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a = 16.

So the first 6 terms are:

16, 8, 4, 2, 1, 1/2.

5 0
2 years ago
Andrew and Sam start counting from 150 to 200 including. Andrew counts by fives, and Sam counts by threes. What is the ratio of
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Answer:

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Step-by-step explanation:

The question says to find the ratio by which Andrew counts to the ratio Sam counts.

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Sam counts by 3s:

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3 years ago
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ludmilkaskok [199]
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Step-by-step explanation:

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navik [9.2K]

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