20 point quickly 5. solve by substitution. find the x, y ordered pair that works for both equations. you must use substitution, and show your work. the recording from the top of the page may . x – 2y = -2 and x – 4y = 10

the ordered pair is (-14,-6)

Step by step:

x – 2y = -2    (Eq. 1)

x – 4y = 10   (Eq. 2)

Isolate x in Eq. 2:

x = -2 + 2y

Substitute that solution x in Eq. 2:

x - 4y = 10

-2 + 2y - 4y = 10

Solve for y:

-2 - 2y = 10

-2y = 10 + 2 = 12

y = -6

Then calculate value for x using the above value for y

x = -2 + 2y

x = -2 + 2(-6) = -14

The solution is (x,y)=(-14,-6)    

you never say the total so we cant find the percentage used for petrol

step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk