Notice the picture below, the perpendicular line from the right-angle,
makes up 3 similar triangles, including the big one containing the small ones
so, you have three similar triangles, one large, a medium and a small one
now, using proportions for those folks, we end up with
solve for "x,y and z"
$100 * 0.20 = $20
tip is $20
Answer:
Step-by-step explanation:
Given: Direct Variation
(0,0) ,(3,12),(9,36)
Required
Constant of Variation
Provided that the given data is a direct variation, the constant variation is represented by r.
r is calculated as thus;
Divide both sides by x
Point (0,0) is the center of origin and cannot be used
When x = 3, y = 12
and
When x = 3, y = 12
and
Notice that the value of r remain constant in both cases; Hence, the constant of variation is;
Answer:
D. 28
Step-by-step explanation:
2(x-9)=7 solve and you would get the answer