(0,0),(1,3)
slope = (3 - 0) / (1 - 0) = 3/1 = 3
y = mx + b
slope(m) = 3
y int (b).....this is when x = 0...u have point (0,0)...this means ur y int is 0
now sub
y = 3x + 0 which can be written as y = 3x <===
You're going to use the substitution method for this.
First, we know that Y = x-7, so we can plug x-7 into everywhere we see Y!
3x - 3(x - 7) = 21
then we simplify
3x - 3x + 21 = 21
^ ^
These cancel out!
So we're left with...
21 = 21
That means that the solution to this equation is all real numbers!
No, 20 divided by 4 is just 5
0.09 = 0.00 because 0 in the tenths is nearer to the 0 than the next number or digit :)
