5x-3-7=9+2x-16
5x-10=2x-7
5x-2x=-7+10
3x=3
X=1
Here's the slope form; (y2- y1) / (x2 - x1)
All you have to do now is just plug in the number into the formula.
(6 - -4) / (6 - 1) = 10/5
Then divide, and the answer is D. 2.
Answer:
407.22 foot is the boat from the base of the lighthouse
Step-by-step explanation:
Given the statement: An observer on top of a 50-foot tall lighthouse sees a boat at a 7° angle of depression.
Let x foot be the distance of the object(boat) from the base of the lighthouse
Angle of depression = 
[Alternate angle]
In triangle CAB:
To find AB = x foot.
Using tangent ratio:


Here, BC = 50 foot and 
then;

or


Simplify:
AB = x = 407.217321 foot
Therefore, the boat from the base of the light house is, 407.22'
I uploaded the answer to a file hosting. Here's link:

Answer:
To answer this question you will use the median height of 156 centimeters and the fact that there are 26 kids in the class to know that the median is not in the data set, therefore it breaks the data into two equal halves with 13 in each half.
There would be 13 less or equal to the median height.
hope i helped ;)