When you're looking to simplfy a number, the best thing to do is to list all of the factors of that number;
21- 1,3,7
8- 1,2,4,8
The only common factor between these is one, and this is what they're currently in, therefore, it cannot be simplified.
Hope this helps :)
The correct answer is B)x = 
.
In order to find this, we need for follow the order of operations.
y - p = m(x - q) ----> Divide both sides by m
= x - q ----> add q to both sides
= x ---> now we need to give it a common denominator. Multiply the q term by m/m
= x
This is our final answer.
5
1
-3
These are your answers
Using SOH CAH TOA
Sin =opposite/hypotenuse
that means opposite=2
Hypotenuse=3
Cos=Adjacent/Hypotenuse
Using Pythagorean theorem
Hyp^2=Opp^2 +Adj^2
3^2 =2^2+adj^2
9=4+adj^2
9-4=adj^2
5=adj^2
Taking the square root of both sides
√5=adj
:: cos=√5/3
