132 people surveyed
132 ÷ (8+3)
12
12 x 8
96 people choose soccer
Answer:
yes
Step-by-step explanation:
as you can see if you count them they are
3x-4y+2z=20
x+y-z=-4
6x-y+2z=23
x=2
y=-1
z=5
First, factor the left side:

This can be simplified using

where the csc term is x and the cot term is y:

One of our Pythagorean Identities states that:

So the left side is now:

Now we can use the same Pythagorean Identity to change the right side to:

All we did was express 1 in terms of csc and cot.
Distribute the negative:

Combine like terms:

Now the left and right sides are the same.