Answer:
The height of the tree is 16.67 feet.
Step-by-step explanation:
Refering the figure, let the height be "x" feet.
It is evident that triangles ABC and triangle EDC are similar.
(as both man and tree are perpendicular to the ground)
thus, 
hence,

Thus,
.
First step: you have to plug in 6y+3 into the equation and solve
Example: 6y+3+2y = 5
Answer:
ab= 7.8
ac= 6
bc=5
Step-by-step explanation:
The side with the larger spaces units are the inches and the side with the smaller spaced units are the centimeters