The dinner check was $78.00.If Erin leaves a 20% tip, howmuch will the tip be?
2 answers:
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I believe it is 10 and however many zeros there are and there's 6 so if I'm not mistaken the answer is 
.
Answer:
Step-by-step explanation:
If a point (x, y) lies on a straight line, coordinates of the point will satisfy the equation.
Slope of a line passing through two points C(4, 5) and D(8, 10),
m =
m =
m =
Equation of the line passing through C(4, 5) and slope m =
y - y' = m(x - x')
y - 5 =
y =
y =
If point B(4, 0) lies on the line CD,
0 =
0 = 5
Which is not true.
Therefore, point B doesn't lie on line CD.
