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aleksley [76]
3 years ago
8

4) If you bought a jersey at 30% off and paid $205.50, how much money did you save?

Mathematics
1 answer:
NemiM [27]3 years ago
6 0

Answer:

$267.15‬

Step-by-step explanation:

The way my math teacher showed me to do it is take the price you paid and multiply it by 1.x (x being the amount of the discount).  

In doing that, $205.50 multiplied by 1.30 is $267.15‬ and the original price of the jersey.

Hope this helps :)

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What is b1 and r of geometrical sequence if b3 −b1 = 16 and b5 −b3 = 144.
Naily [24]

Answer:

b1 = 2 ; r = 3

Step-by-step explanation:

Given that :

if b3 −b1 = 16 and b5 −b3 = 144.

For a geometric series :

Ist term = a

Second term = ar

3rd term = ar^2

4th term = ar^3

5th term = ar^4 ;...

If b3 - b1 = 16;

ar^2 - a = 16

a(r^2 - 1) = 16 - - - (1)

b5 - b3 = 144

ar^4 - ar^2 = 144

ar^2(r^2 - 1) = 144 - - - - (2)

Divide (1) by (2)

a(r^2 - 1) / ar^2(r^2 - 1) = 16 /144

a / ar^2 = 1 / 9

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9a - a = 16

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From ar^2 - a = 16

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3 years ago
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allochka39001 [22]

Answer:

x = 9

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