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nikitadnepr [17]
3 years ago
11

2x + y = 2 x – 2y = -4 what is x and y?

Mathematics
1 answer:
sergiy2304 [10]3 years ago
5 0

Answer:

x = 0

y = 2

Step-by-step explanation:

2x + y = 2 (Multiply by 2)

x – 2y = -4

4x + 2y = 4

x – 2y = -4

5x = 0

x = 0

2x + y = 2

2(0) + y = 2

0 + y = 2

y = 2

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aleksklad [387]

Answer:

Speed of Chris Huber = 30.726 m/s

Time taken by Sam = 5.55 s

Step-by-step explanation:

Given:

Distance = 200 m

Time taken by Chris Huber = 6.509 s

Now,

Speed of Chris Huber = \frac{\textup{Distance}}{\textup{Time}}

or

Speed of Chris Huber = \frac{\textup{200 m}}{\textup{6.509 s}}

or

Speed of Chris Huber = 30.726 m/s

Speed of Sam = Speed of Chris Huber + 19.0 km/h

Now,

1 km/hr = 0.277778 m/s

thus,

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therefore,

Time taken by Sam = \frac{\textup{Distance}}{\textup{Speed}}

or

Time taken by Sam = \frac{\textup{200}}{\textup{36.004}} = 5.55 s

6 0
3 years ago
Jasmine invests $2,658 in a retirement account with a fixed annual interest rate of 9% compounded continuously. What will the ac
Feliz [49]

Answer:

$10,253.04

Step-by-step explanation:

You are going to want to use the continuous compound interest formula, which is shown below.

A = Pe^{rt}

<em>P = principal amount</em>

<em>r = interest rate (decimal)</em>

<em>t = time (years)</em>

<em />

First, change 9% into a decimal:

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Next, plug the values into the equation:

A=2,658e^{0.09(15)}

A=10,253.04

The account will have $10,253.04

4 0
3 years ago
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Step-by-step explanation:

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3 years ago
Factor completely h^3+2h^2-9h-18
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Step 1: Group this into two groups:

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When you  do that, be sure to group the "–" into the group with the 9 and make sure there's "+" between the groups.

Step 2: Factor out the GCF from both individual groups:

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Step 3: Notice both groups have that (h+2)?  That's a new GCF between the two groups, so factor that out:

    h^2 (h+2) -9(h+2) = (h+2)(h^2-9)

Step 4: That (h^2-9) piece can be factored further, since it's a difference of squares:

    (h+2)(h^2-9) = (h+2)(h+3)(h-3)

Now it's factored.

8 0
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un repartidor de refrescos entrego 90 cajas en tres pedidos. En le primero dejo el doble que en el segundo, y en el segundo, el
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Answer:

Step-by-step explanation:

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