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jek_recluse [69]
3 years ago
13

Sarah is saving money to buy a camera that costs $189. She saved $99 so far. She is also planning on saving $10 a week. In how m

any weeks will she have enough money to buy a camera? Write an equation and solve.
Mathematics
1 answer:
inna [77]3 years ago
4 0

Answer:

9 more weeks!

if you add 10 each week you find out.

Step-by-step explanation:

1 more week will be $109, 2 more weeks will be $119, 3 more weeks, $129, 4 more weeks $139, 5 more weeks will now be $149, the 6th week is $159, the 7th week is $169, the 8th week is $179, the 9th week will be $189. $189 is precisely what she needs for the camera.

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Answer:

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Step-by-step explanation:

According to triangle inequality theorem, a triangle exists if the sum of two sides is greater that third side.

Apply this theorem on each combination.

Case I: (2x+4)+6x>18

8x+4>18

8x>14

x>\dfrac{14}{8}

x>\dfrac{7}{4}      ...(1)

Case II: (2x+4)+18>6x

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Case III: 6x+18>2x+4

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x>-\dfrac{7}{2}     ...(3)

On combining (1), (2) and (3), we get

\dfrac{7}{4}

Therefore, the correct option is A.

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