Answer:
<h2>7n + 28</h2>
Step-by-step explanation:

Expand

Answer:
The circumference of a circle is equal to Pi π times the diameter d
Step-by-step explanation:
Answer:
The slope would be 1/2
Step-by-step explanation:
y= mx +b
m= slope
perpendicular lines have slopes that are multiplied in order to get -1
<em>these are important</em>
<em></em>
2x + y = 4
<u><em>subtract 2x</em></u>
y=-2x +4
your slope is -2
-2 * ? = -1
? = -1/-2
? = 1/2
Answer:
a) 
b) 
c) 
d) 
Step-by-step explanation:
a) The problem tells us that angle
is in the second quadrant. We know that in that quadrant the cosine is negative.
We can use the Pythagorean identity:

Where we have used that the secant of an angle is the reciprocal of the cos of the angle.
Since we know that the cosine must be negative because the angle is in the second quadrant, then we take the negative answer:

b) This angle is in the first quadrant (where the sine function is positive. They give us the value of the cosine of the angle, so we can use the Pythagorean identity to find the value of the sine of that angle:

where we took the positive value, since we know that the angle is in the first quadrant.
c) We can now find
by using the identity:

Notice that we need to find
, which we do via the Pythagorean identity and knowing the value of the cosine found in part a) above:

Then:

d)
Since 
then 
Answer:
The red graph. y intercept is at 20k and is decreasing