Answer:

Step-by-step explanation:
Given

Required
Determine the equation of line that passes through (-8,0) and parallel to 
Parallel lines have the same slope.
In 
The slope, m is

because the general form of a linear equation is:

Where

So, by comparison:

Next, is to determine the equation of line through (-8,0)
This is calculated using:

Where


So, we have:






Answer:
x=14
Step-by-step explanation:
Since the triangles are similar, you first line up the sides. Then, because the 16 and the 24 line up together, you divide them to find out how much bigger the first triangle is, which is 3/2 or 1.5. After that, you can see that the 21 and the x are on the same side, so you would divide 21 by 1.5 or 3/2 to get x. 21÷1.5=14.
x=14