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scoundrel [369]
2 years ago
11

I need help on this question I need the answer please

Mathematics
1 answer:
SCORPION-xisa [38]2 years ago
5 0
Answer: -1
Explanation: I'm not completely sure but I think you just have to substitute x with 1
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Answer:

1,520,000 liters of water

Step-by-step explanation:

4x10^4= 40000. 38x40000=1,520,000

1.52x10^6

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P(x) = 2x² + 1<br> What is the inverse for p(x)?
Serhud [2]

Answer:

P^{-1} (x)=\sqrt{\frac{x-1}{2} }

Step-by-step explanation:

1. P(x)=2x^{2} +1

2. y=2x^{2} +1

3.x=2y^{2} +1

4.2y^{2} =x-1

5.y^{2} =\frac{x-1}{2}

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4x + y = 7<br>3x + 2y = 9​
Diano4ka-milaya [45]

Answer:

x = 1

y = 3

Step-by-step explanation:

<h2><em><u>Substitution Method</u></em><em><u>:</u></em></h2>

Step 1:

Name The Equation

4x + y = 7 ...(1)

3x + 2y = 9 ...(2)

Step 2:

From Equation (1) we get,

4x = 7 - y

i.e.,

x = 7 - y/4

Step 3:

Substitute the value of <em><u>x = 7 - y/4</u></em> in equation (2)

i.e.,

3(7 - y/4) + 2y = 9

21 - 3y/4 + 2y = 9

21 - 3y + 8y/4 = 9

21 - 3y + 8y = 9 * 4

21 + 5y = 36

5y = 36 - 21

5y = 15

y = 15/5

<em><u>y = 3</u></em>

Step 4:

Substitute the value of <em><u>y = 3</u></em> in equation (1)

4x + y = 7

i.e.,

4x + (3) = 7

4x + 3 = 7

4x = 7 - 4

4x = 4

x = 4/4

<em><u>x = 1</u></em>

<h2><em><u>Verification</u></em><em><u>:</u></em><em><u> </u></em></h2>

4x + y = 7 i.e., <em>4(1) + (3) = 7</em>

3x + 2y = 9 i.e., <em><u>3(1) + 2(3) = 9</u></em>

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Step-by-step explanation:

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