I think it might be r= -3
Answer:
f^-1 (x) = (1 - x)/3.
Step-by-step explanation:
f(x) = -3x + 1
3x = 1 - f(x)
x = (1 - f(x)) / 3
So f^-1 x = (1 - x)/3.
Answer:
12.5
Step-by-step explanation: The triangle ABC and its altitude
is represented in the figure below.
<u>Altitude</u> is a segment of line that link a vertex and the opposite side, forming a right angle.
So, because of
, now we have two similar triangles, which means that ratios of corresponding sides are equal:

(1)
This is always true for a right triangle and a altitude drawn to the hypotenuse.
Triangle BDC is also right triangle. So, we can use Pythagorean theorem to determine the missing side.

(2)
Substituting (2) into (1):

We want to find f, so:


f = 7.5
The length of
is



The length of the hypotenuse of triangle ABC is 12.5 units.
4/12 of the fans are kids because 1/4 can be multaplied by 3 to get 3/12