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Dvinal [7]
4 years ago
15

41 + 2y = 0 - 4x – 9y= - 28 Solve each system by elimination

Mathematics
1 answer:
Iteru [2.4K]4 years ago
4 0

<em><u>Question:</u></em>

4x + 2y = 0

- 4x – 9y= - 28

Solve each system by elimination

<em><u>Answer:</u></em>

The solution is x = -2 and y = 4

<em><u>Solution:</u></em>

<em><u>Given system of equations are:</u></em>

4x + 2y = 0  ------ eqn 1

-4x – 9y = - 28  ------- eqn 2

We have to solve the system of equations by elimination method

Add eqn 1 and eqn 2

4x + 2y -4x -9y = 0 - 28

0 + 2y - 9y = -28

-7y = -28

Divide both sides by -7

y = 4

<em><u>Substitute y = 4 in eqn 1</u></em>

4x + 2(4) = 0

4x + 8 = 0

4x = -8

Divide both sides by 4

x = -2

Thus the solution is x = -2 and y = 4

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Step-by-step explanation:

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6 0
3 years ago
Using V = lwh , find an expression in factored form for the volume of this prism. Explain the general steps you used to arrive a
Lorico [155]
I did this before the correct answer is.

Using the given equation of,
                              V = lwh
The volume of the given prism in the figure is,
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By factoring,
                            V = ((x)(x - 1) / (4x + 1))(2x - 5)((6x)(4x + 1) / (x - 1))
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3 0
3 years ago
Read 2 more answers
Find all the zeros of f(x).
Vitek1552 [10]

Answer:

The zeroes are -6, 1/2 and 2.

Step-by-step explanation:

f(x) = 2x3 + 7x2 - 28x + 12 = 0

From the first and last coefficient 2 and 12, one guess for a zero is x = 2.

So substituting x = 2:

f(2) = 16+ 28 - 56 + 12 = 0

So x = 2 is a zero and x - 2 is a factor of f(x)

Performing long division:

x - 2)2x3 + 7x2 - 28x + 12( 2x2 + 11x - 6 <------- Quotient

       2x3  - 4x2

                 11x2 - 28x

                 11x2 - 22x

                          - 6x + 12

                           -6x + 12

                            .............

Now we solve

2x2 + 11x - 6 = 0

(2x - 1)(x + 6) = 0

2x - 1 = 0 or x + 6 = 0, so:

x = 1/2,  x = -6.

4 0
3 years ago
The rules of a contest say that there is a 5% chance of winning a prize. 400 people enter the contest. Predict how many people w
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Answer:

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Step-by-step explanation:

In this problem, you are solving for 5% of 400. All percentages are out of 100, meaning 5% equals 0.05 because 5 ÷ 100 = 0.05

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8 0
4 years ago
Read 2 more answers
The range of the data
Natali [406]
The range refers to the area where the data points fall from the lowest to highest. Here, the lowest point is 437 and the highest is 1465. So the range is from 437 to 1465

Hope this helps
7 0
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