PLEASE HELP I NEED TO FINISH THIS IN 5 MINUTESSSS!!!!!!!

Mathematics

2 answers:

Orlov [11]2 years ago

8 0

I think for 3x + y = 11 is 3*3 + 2 and for -8x +y= 11 is -8*-1+3 so maybe the answer is C. 2 solutions

NeTakaya2 years ago

5 0

Answer:

1 solution

Step-by-step explanation:

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Please help with this

slava [35]

Answer:

D) x= $\frac{-2+-2\sqrt{7} }{3}$

Step-by-step explanation:

The quadratic formula is : $\frac{-b+-\sqrt{b^2-4ac} }{2a}$

A in terms of this question=9

B in terms of the question is 12

C in terms of the question is -24.

This question is an example of a quadratic equation. To work this out you may first need a calculator. The first step is to substitute the values of a,b and c into the formula. So once substituted the formula of $\frac{-b+-\sqrt{b^2-4ac} }{2a}$ becomes $\frac{(-12)+-\sqrt{(12)^2-4*(9)*(-24)} }{2(9)}$ . Although when written in a calculator there will not be a plus and minus button and so you would have to do this separately.