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2 years ago

What method would you choose to solve the equation 2x^2-7=9? explain why you chose this method.

Mathematics

2 answers:

erik [133]2 years ago

7 0

Answer:

Sample Response: I would use the square root property of equality. Because there is no x term, I would just add and divide to get x^2 by itself. Then I would take the square root.

2x^2 - 7 = 9

2x^2 - 7 + 7 = 9 + 7

2x^2 = 16

2x^2/2 = 16/2

x^2 = 8 (square root of 8 would be square root of 4*2 = 2*square root of 2

x = +/- 2*square root of 2

Nikolay [14]2 years ago

6 0

Answer:

2.87

Step-by-step explanation:

2x^2-7=9

2x^2=9+7

2x^2/2=16/2

(square root)x^2=(square root)8

x=2.87

I used this method because I don't know any other method.

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y ----> the number of acres of carrots

we know that

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Verify each case

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The point is a solution for the inequality, but is not a viable solution because the number of acres can not be a negative number

case B) (80,160)

substitute the value of x and the value of y in the inequality and then compare the result

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therefore

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case C) (75,-200)

substitute the value of x and the value of y in the inequality and then compare the result

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substitute the value of x and the value of y in the inequality and then compare the result

$60+135\leq 200$

$195\leq 200$ ----> is true

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