Using the elimination method how do i do 5x + 6y = 50 -x + 6y =26

y = 5 and x = 4

Step-by-step explanation:

You need to get the same number either in front of both x's or both y's.

As there is already a value the same for both y's, we can already subtract the two equations:

5x - -x = 6x

6y - 6y = 0

50 - 26 = 24

6x = 24

Divide both sides by 6 to find x:

6x ÷ 6 = x

24 ÷ 6 = 4

x = 4

Substitute this value into first equation:

5(4) + 6y = 50

20 + 6y = 50

Move the +20 over to the other side making it a -20:

6y = 50 - 20

6y = 30

Divide both sides by 6:

6y ÷ 6 = 7

30 ÷ 6 = 5

So y = 5

This means that y = 5 and x = 4

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

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