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Gnom [1K]
2 years ago
13

Sam opened a money account that pays 3 % simple interest. He started the account with 7000$ and made no further deposits. When h

e closed the account, he had earned 1,050$ in interest. How long did he keep his account open?
Mathematics
1 answer:
Novosadov [1.4K]2 years ago
8 0
He kept his account open for 3 years
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Pleas help me find the answer and show the work to this question
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Answer:

Leg\ 1 = 8

Leg\ 2 = 15

Step-by-step explanation:

Given: See Attachment

Required

Determine the length of the legs

To do this, we apply Pythagoras theorem.

Hyp^2 = Adj^2 + Opp^2

In this case:

17^2 = x^2 + (2x- 1)^2

Open Bracket

17^2 = x^2 + 4x^2- 2x-2x + 1

17^2 = 5x^2 - 4x + 1

289= 5x^2 - 4x + 1

Collect Like Terms

5x^2 - 4x + 1 - 289 = 0

5x^2 - 4x - 288 = 0

Solving using quadratic formula:

x = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}

So:

x = 8 or x = -7.2

Since, x can't be negative, then:

x = 8

One of the leg is:

Leg\ 1 = x

Leg\ 1 = 8

Leg\ 2 = 2x - 1

Leg\ 2 = 2*8 - 1

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Leg\ 2 = 15

6 0
2 years ago
The product of 5 and a number is at least 20.
svp [43]

Answer:

Step-by-step explanation:

the answer is 5x\geq 20

8 0
3 years ago
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