Answer:
Orginal Speed is 135
Step-by-step explanation:
The ratio of final speed: original speed is

We know that 90 km is it final speed so, we set up a proportion


Since it’s in the tenths place it’s 50
Answer:
(nearest tenth)
Step-by-step explanation:
Given the distance formula,
, distance between (-4, 5) and (4, 0) is calculated as follows:
Let 





(nearest tenth)
Answer:
X=16
Step-by-step explanation:
Since the lines are parallel the angles are equal so set the equations equal
Draw a right triangle to represent the problem.
The vertical height of the triangle is 9 ft, and it represents the tree.
The horizontal length, at the bottom of the tree is ground level and has a length of 13 ft.
Let x = angle of elevation.
By definition,
tan x = 9/13 = 0.6923
x = arctan(0.6923) = 34.7 deg. = 35 deg (approx)
Answer: 35°