Answer: 3
Step-by-step explanation:
The sine of an angle is equal to the cosine of its complement, so

Answer C is correct. If angle 1 + angle 2 = 180 degrees then L is parallel to M.
Co interior angles are only supplementary in parallel lines
Answer: {x,y} = {27/4,-47/8}
Answer:

Step-by-step explanation:
step 1
Find the volume of the cylinder
The volume of the cylinder is equal to

we have
---> the radius is half the diameter

substitute

step 2
Find the volume of the cone
The volume of the cone is equal to

we have
we have
---> the radius is the same that the radius of the cylinder

substitute

step 3
Find the volume of the plastic object
we know that
The volume of the plastic object is equal to the volume of the cylinder minus the volume of the cone
so

assume



Recall that


Your sums start at
, so in order to apply these formulas directly, you need to compensate for the missing first two terms:


