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AVprozaik [17]
3 years ago
11

What does 6x − 9 = 45 equal?

Mathematics
2 answers:
ale4655 [162]3 years ago
6 0

Answer:

x = 9

Step-by-step explanation:

  1. Add 9 to each side to begin simplifying. It should now look like this:      6x = 54
  2. Now, divide each side by 6 to find the value of x. It should look like this:     x = 9

I hope this helps!

Westkost [7]3 years ago
4 0

Answer:

9

Step-by-step explanation:

Add nine to both sides:

6x = 54

Divide by six:

\frac{6x = 54}{6}

x = 9

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<u>Question:</u>

Find the number of real number solutions for the equation. x^2 + 5x + 7 = 0

<u>Answer:</u>

The number of real solutions for the equation x^{2}+5 x+7=0 is zero

<u>Solution:</u>

For a Quadratic Equation of form : a x^{2}+b x+c=0  ---- eqn 1

The solution is x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}  

Now , the given Quadratic Equation is x^{2}+5 x+7=0  ---- eqn 2

On comparing Equation (1) and Equation(2), we get

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In x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a} , b^2 - 4ac is called the discriminant of the quadratic equation

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Now, here are the rules with discriminants:

1) D > 0; there are 2 real solutions in the equation

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Since -3 is less than 0, this means that there are 0 real solutions in this equation.

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