Step-by-step explanation:
1)

Answer:
16 questions right = 80%
So Peter missed 4 questions.
Hope this helps.
:-)
Answer:
x=5
Step-by-step explanation:
Isolate the x by adding 9 on both sides:

Take the square root of both sides:

Simplify:
<u>x=5</u>
Answer:
Step-by-step explanation:
the "n" is the offset from zero. In this case it's -6
n = -6
:)
Answer:
y = 5x + 8
Step-by-step explanation:
If you want to find a equation parallel to the line given, you need to know the slope of the line given. Remember that parallel lines have the same slope.
5x - y = 4 and solving for y:
-y = -5x + 4 and solving for positive y:
y = 5x - 4
So the slope of that line is 5. We will use that along with the coordinate given to us to write the equation first in point-slope form then in slope-intercept:
y - (-2) = 5(x - (-2)) and
y + 2 = 5(x + 2) and
y + 2 = 5x + 10 so
y = 5x + 8