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3 years ago

Which equation shows the quadratic formula used correctly to solve 7x2 = 9 + x for x?

Mathematics

2 answers:

nydimaria [60]3 years ago

7 0

I hope this helps you

otez555 [7]3 years ago

5 0

Answer:

Quadratic formula for given equation is $x=\frac{-(-1)\pm\sqrt{(-1)-4(7)(-9)}}{2\times7}$

Step-by-step explanation:

Given Quadratic Equation is 7x² = 9 + x

We need to find correct Quadratic formula for the given quadratic equation.

If the quadratic equation is in standard for,

ax² + bx + c = 0

then quadratic formula is given by,

$x=\frac{-b\pm\sqrt{b-4ac}}{2a}$

First we rewrite the quadratic equation,

7x² - x - 9 = 0

by comparing with standard form of equation we get,

a = 7 , b = -1 and c = -9

oNw putting these value in quadratic formula we get,

$x=\frac{-(-1)\pm\sqrt{(-1)-4(7)(-9)}}{2\times7}$

Therefore, Quadratic formula for given equation is $x=\frac{-(-1)\pm\sqrt{(-1)-4(7)(-9)}}{2\times7}$

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Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

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3 years ago

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Vika [28.1K]

Answer: He had 14 more touchdowns than he did fumbles.

Step-by-step explanation:

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18/9=2.

Step 2. So now that we know that 9 goes into 18 two times and we know he has two fumbles for every 9 touchdowns we can multiply 2 by 2 to find out how man fumbles he had.

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Hope this helps!

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