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kow [346]
1 year ago
14

Find the principal needed now to get the given amount; that is, find the present value.

Mathematics
1 answer:
wel1 year ago
8 0
I believe the answer is either 40 or 250.
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Solve for x and y<br><br>6/x+2y + 5/x-2y = -3 ;<br>3/x+2y + 7/x-2y = -6​
Radda [10]

Step-by-step explanation:

Let

{1/(x+2y)} = u -----Eqn(1)

{1/(x-2y)} = v ------Eqn(2)

So, given equation can be rewritten as

⇛6u + 5v = -3 ---Eqn(3)

⇛3u + 7v = -6 -----Eqn(4)

On multiply equation (4) by 2, we get

⇛6u + 14v = -12 -----Eqn(5)

On subtracting equation (3) from equation (5), we get

⇛9v = -9

⇛v = -9/9

⇛v = -1 ----Eqn(6)

Put value of v in equation (3), we get

6u + 5v = -3

⇛6u + 5 * (-1) = -3

⇛6u -5 = -3

⇛6u = -3 + 5

⇛6u = 2

⇛u = 2/6

⇛u = (2÷2)/(6÷2)

⇛u = 1/3 -----Eqn(7)

Now, substituting value of u and v in equation (1) and equation (2), we get

{1/(x+2y)} = 1/3 and {1/(x-2y)} = -1

⇛x + 2y = 3 -----Eqn(8)

⇛x - 2y = -1 -------Eqn(9)

Now, add equation (8) and equation (9) , we get

⇛2x = 2

⇛x = 2/2

<h3>⇛x = 1 -----Eqn(10)</h3>

On substituting x = 1 in equation (8), we get

x + 2y = 3

⇛ 1 + 2y = 3

⇛2y = 3 - 1

⇛2y = 2

⇛y = 2/2

<h3>⇛y = 1 ------Eqn(11)</h3>

Therefore, x = 1 and y = 1

<u>Answer</u><u>:</u> Hence the value of x and y is 1 and 1.

8 0
2 years ago
Ramon plays outfield. In the last game, 15 balls were hit in his deriction. He caught 12 of them. What is the experimental proba
marishachu [46]

Answer:

12/15 as he has already had 15 outcomes.

Step-by-step explanation:

8 0
3 years ago
The higher interest rate of a cash advance on a credit card with an existing balance can be eliminated by paying the cash advanc
finlep [7]

The answer is False.

8 0
2 years ago
Read 2 more answers
6 mi Find the volume for the shape above. Use 3.14 for pi. Round to the nearest whole number.​
vodka [1.7K]

Answer:

Step-by-step explanation: does anyone know? I really need this

4 0
2 years ago
Caroline has 16 marbles 1/8 of them are blue how many of Caroline's marbles are blue
DedPeter [7]
2 . You have to divide 16 by 8. you get 2 . Hoped that helped
4 0
3 years ago
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