Answer:
Biff's tree is 14 m off the ground and Rocco's tree is 7 m off the ground.
Step-by-step explanation:
Let the height of Biff's tree be represented by x, so that the height of Rocco's tree is
.
Draw a straight line from Rocco's point of view to a point t to the middle of Biff's tree. This line divides x into two equal parts, and the angle is divided into
each.
By alternate angle property,
Tan
= 
= Tan
× 10
= 7.00021
⇒ x = 2 × 7.0021
= 14. 0042
x = 14
Therefore, Biff's tree is 14 m off the ground and Rocco's tree is 7 m off the ground.
Answer:
Opens upward
Step-by-step explanation:
Since the coefficient of
is a positive number +8, then it is a parabola that opens upward
Answer:

Step-by-step explanation:
Solve the following equation for x:

Answer:
.
Step-by-step explanation:
Well 31 is not able to go any were and it has to stay 31