I think x is 20 I’m not sure tho since it would come out as -10 instead of positive
-2f(x) means it is reflected and has a negative slope.
and for the 2 it means that the graph is compressed horizontally by factors of units
if it's less than 2 it would have been stretched, but since it's greater than 1 it is compressed.
Answer:
202m
Step-by-step explanation:
Complete question
(A zip line starts on a platform that is 40 meters above the ground. The anchor for the zip line is 198 horizontal meters from the base of the platform.
How long is the zip line? See attached diagram for illustration)
Using pythagoras theory
Y = 40
Z = 198
X =?
X² = y² + z²
X² = 40² + 198²
X² = 40804
X = 202m
The zip line is 202m
20 = × + 2 (2x-5)
20 = x + 4x - 10
20 = 5x - 10 add 10 to both sides
30 = 5x divide both sides by 5
6 = x
1 side is 6 the other 2 sides are 7