Answer: {x,y}={-1,2}
step-by-step explanation:
// Solve equation [2] for the variable x
[2] 2x = 5y - 12
[2] x = 5y/2 - 6
// Plug this in for variable x in equation [1]
[1] 2•(5y/2-6) + 3y = 4
[1] 8y = 16
// Solve equation [1] for the variable y
[1] 8y = 16
[1] y = 2
// By now we know this much :
x = 5y/2-6
y = 2
// Use the y value to solve for x
x = (5/2)(2)-6 = -1
Solution :
{x,y} = {-1,2}
![x + 2y = 6](https://tex.z-dn.net/?f=x%20%2B%202y%20%3D%206)
![x = - 2y + 6](https://tex.z-dn.net/?f=x%20%3D%20%20-%202y%20%2B%206)
![2( - 2y + 6) + 4y = 12](https://tex.z-dn.net/?f=2%28%20-%202y%20%2B%206%29%20%2B%204y%20%3D%2012)
then find y and plug that y value into one of the original equations to find x
Hope this helps!
It is the last answer choice (6x-9y)(6x+9y)
Answer:
KL = 7.8
Step-by-step explanation:
KH = HL
KH + HL = KL
3.9 + 3.9 = 7.8