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nika2105 [10]
3 years ago
9

the first, second and fifth term of a linear sequence (A. P) is /are three consecutive terms of an exponential sequence (G. P),

if the first term of the linear sequence is 7. Find the common difference.​
Mathematics
1 answer:
vredina [299]3 years ago
8 0

Answer: common difference is 14

Step-by-step explanation:

a,a+d,a+4d

7,7+d,7+4d

(7+d)/7=(7+4d)/(7+d)

(7+d)(7+d)=7(7+4d)

49+14d+d^2=49+28d

d^2-14d=0

d(d-14)=0

d=0 or d-14=0

d=14

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4x-y=20 and -2x-2y=10
lara31 [8.8K]

You can use Substitution to solve this problem:


4x-y=20

-y=-4x+20

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Now that we have figured out what x is, we can substitute x in to one of the equations to figure out y.


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on dividing $200 between A and B such that twice of A's share is less than 3 times than B's share by $20
Wittaler [7]

Answer:

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Step-by-step explanation:

Let the share of A be x

Let the share of B be y

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twice of A's share is less than 3 times than B's share by $20

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Solution:

Now multiplying equation 1 by 3 we get,

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Now Adding equation 2 and equation 3 we get

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dedylja [7]

Answer:

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