So 4*10^7 is _ times greater then 4*10^3
So, 4000, 40000000
So 10000 times greater
Solve by elimination ie eliminate x or y from the equations by performing operations on them.
first label the equations , to follow the process.
x - y = 5 ----------------(1)
x+ y = 3 ----------------(2)
If (1) and (2) are added then y will be eliminated.
(1) + (2) gives : 2x = 8 → x = 4
now substitute this value of x into either of the 2 equations and solve for y.
let x = 4 in (1) : 4 - y = 5 → -y = 1 → y = -1
check in (1) : 4-(-1) = 4+1 = 5
check in(2) : 4 - 1 = 3
So your answer is x = 4 , y = -1
Card K is reflected over the y-axis; while card N is reflected over the x-axis
Solve for y in one of the equations.
4x + y = 11
Subtract 4x from both sides.
y = -4x + 11
Substitute y in the other equation.
8x + 2(-4x + 11) = 13
Simplify.
8x + -8x + 22 = 13
Subtract 22 from both sides.
0 = -9
No solutions.
