Answer:
This quadratic equation has 2 solutions.
Step-by-step explanation:
I assume the '?' in your question is meant to be power 2 (²), or else it would not be a quadratic equation. You could write it using the superscript version of 2.
We can solve this equation by expressing it in the form: ax² + bx + c
x² + 9x= -8
x² + 9x + 8 = 0
Now if you know the discriminant, you can simply plug in your values of a, b, and c to see how many solutions there are.
In this case, you would not need the discriminant as there are whole-number factors and hence this can simply be factorised.
x² + 9x + 8 = 0
(x + 8)(x + 1) = 0
For this equation to be true (= 0), x can equal -8 OR -1.
Hence, this quadratic equation has 2 solutions.
Answer:
30
Step-by-step explanation:
25-10 = 15
15 x 2 = 30
I think that would be 40 correct me if I’m wrong
Answer:
3.2%
Step-by-step explanation:
<span>4x+7y=51
Plug in </span><span>y=5::
4x+7(5)=51
Simplify:
4x+35=51
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<span>4x+35-35=51-35
4x=16 (÷4)
x=4
Done :)
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I hope that
helps!
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