The absolute value is 10/7
Answer:
The focus is: 
Step-by-step explanation:
Given

Required
Determine the focus
The focus of a parabola

is:

So, we have:

Cross multiply

Rewrite as:

Rewrite as:

Express 8 as 4 * 2

By comparison with: 

So, the focus
is:


Answer:
The value of x is 4, 3rd point.
Step-by-step explanation:
Move all the variables to one side & move unknown value to the other side :
4x - 3 = 2x + 5
4x - 2x = 5 + 3
2x = 8
Then solve it :
2x = 8
x = 8/2
x= 4
Answer:
1.61 mile
Step-by-step explanation:
Tan 15 = opposite / adjacent = height / 6 miles
soooo 6 tan 15 = height = ~ 1.61 mile
Answer:
Step-by-step explanation:
Knowing only side-side-angle (SSA) does not work because the unknown side could be located in two different places. Knowing only angle-angle-angle (AAA) does not work because it can produce similar but not congruent triangles. ... The same is true for side angle side, angle side angle and angle angle side.