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agasfer [191]
3 years ago
15

What is the system of linear equations

Mathematics
1 answer:
Tamiku [17]3 years ago
5 0
A) y = 2x -4
B) x + 2y = 12
A) -2x + y = -4
A) -x +.5y = -2 then adding to B
B) x + 2y = 12

2.5y = 10
y = 4

x = 4
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Which graph represents a quadratic function that has one real zero?
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Answer:

Step-by-step explanation:

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After being rearranged and simplified, which of the following equations could
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Answer:

C and D

Step-by-step explanation:

The quadratic formula is

x= (-b±√b²-4ac)/2a

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So, lets try and see;

A.

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But due to the fact that  in this equation you have x⁴, the equation is not a quadratic equation thus can not be solved using this formula

B

-x^2+4x+7=-x^2-9\\\\\\=-x^2+x^2+4x+7+9\\=4x+16

C

9x+3x^2=14+x-1\\\\\\=3x^2+9x-x-14+1\\\\=3x^2+8x-13\\\\\\a=3,b=8,c=-13\\

D.

2x^2+x^2+x=30\\\\\\=3x^2+x-30\\\\\\a=3,b=1,c=-30

From the checking above, the equations will be C and D

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