If they left 15% the tip should be
$11.40, making the total fee $87.40
Look at the picture.
We have the right triangle x, y and r. From the Pythagorean theorem we have:
We have the point
Substitute:
Answer:
9x + 36 = 10
Step-by-step explanation:
Given
x + 3 =
Multiply by the lowest common multiple of 4 and 6, that is 12
12 × x + 12 × 3 = 12 × , that is
9x + 36 = 10 ← equation without fractions
Consider ΔAQD. This triangle has the area
where H is the heigh drawn from the point Q to the side AD.
Note that the height H is also the height of the parallelogram. So the area of the parallelogram ABCD is
From these two statements you can conclude that
Now consider ΔDMQ. The ratio between the area of triangles DMQ and AQD is
Since you have that
and
Thus,
Answer: correct choice is B