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Bond [772]
3 years ago
6

How do I solve 2(6x-1)+2(2x+5)=120

Mathematics
1 answer:
Tomtit [17]3 years ago
7 0

2(6x-1)+2(2x+5)=120

12x-2+4x+10=120

16x+8=120 |-8

16x=112 |/16

x=112/16

x=7

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Answer:

D. -x^{2} -2x+3=2x^{2} -8x+3

Step-by-step explanation:

We are given that,

The graph of the system of equations is a 'quadratic graph opening down and a quadratic graph opening up'.

This means that one quadratic equation will have leading co-efficient positive and other will have leading co-efficient negative.

So, we get that options A and B are discarded.

Further it is provided that the graph intersect at ( 0,3 ) and ( 2,-5 ).

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So, according to the options:

C. -x^{2} -2x+3=2x^{2} -8x-3

Putting x = 0, gives 3 = -3, which is not possible.

So, option C is dicarded.

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Putting x = 0 gives 3 = 3 and x = 2 gives -5 = -5.

Hence, the graph of the given system solves the equation -x^{2} -2x+3=2x^{2} -8x+3.

7 0
3 years ago
Please help... thanks
marshall27 [118]
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