Answer:
B
Step-by-step explanation:
4 x 0.9=3.6
6 x 0.9=5.4
12 x 0.9=10.8
Given line q and line r, with equations
<span>y = m x + b1 y = m x + b2</span>
such that these are different lines, with identical slopes. Prove that line q || line r.
If these lines are parallel, then they will not intersect. Assume the lines intersect. Calculate the point of intersection. Since these equations already have the same slope, we may as well subtract one equation from the other one.
This gives us the following equation:
<span>0 = <span>b1</span> - <span>b2</span> <span>b1</span> = <span>b2</span> </span>
If <span>b1</span> = <span>b2</span>, then line q is the same line as line r. This contradicts the given conditions.
Therefore, line q and line r cannot intersect. If line q and line r do not intersect, they must be parallel.
Let us assume the total amount of meal charge paid by Michael without tax = x
Then
Amount paid to the waiter by Michael = 15x/100
Sales tax paid by Michael = 5x/100
Now we get the equation as
x + (5x/100) + (15x/100) = 18
(100x + 5x + 15x)/100 = 18
120x/100 = 18
120x = 1800
x = 1800/120
= 180/12
= 15 dollars
So the amount paid by Michael for the meal before tax and tip is $15. I hope the procedure is clear enough for you to understand.
