2 years ago

If y = 7 what is the value of x

Mathematics

1 answer:

Katyanochek1 [597]2 years ago

8 0

Answer:If y = 7 what is the value of x would be 7

Step-by-step explanation:

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Solve x2 - 8x - 9 = 0. Rewrite the equation so that it is of the form x2 + bx = c.

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Answer:

x=9,-1 and $x^2+(-8)x=9$

Explanation:

we have been given with the quadratic equation $x^2-8x-9$

we compare the given quadratic equation with general quadratic equation

general quadratic is $ax^2+bx+c=0$

from given quadratic equation a=1,b= -8,c= -9

substituting these values in the formula for discriminant $D=b^{2}-4ac$

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Now, to find the value of x

Formula is $x=\frac{-b\pm\sqrt{D}}{2a}$

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$x^2+bx=c$

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What is the mass of a 15cm cube of lron if density of iron is 78grams/cm

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M = 1170 g

Step-by-step explanation:

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Step-by-step explanation:

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Parker has $2,500 in her bank account that earns 3.8% interest annually. How much money will she have in her bank account after

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Step-by-step explanation:

2,500 * 3.8% = 90 in interest a year

90 * 4 = 360 in interest

add that to what she put in

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