Answer:I believe this is a demonstartion of the communitive property the equation backwards is the right5 awnser
Step-by-step explanation:

Let's solve ~
The given triangle is a right angled Triangle, so we can apply Trigonometric relations to find the required result ;
That is :




So, the value of z is 
X=30
10=10
checking:
1/3(30)=1/2(30)-5
Answer:
Step-by-step explanation:
The answer is 173. Just use the calculator
Answer:
B, E
Step-by-step explanation:
Given expression

First, use the distributive property:

Use distributive property once more:

So, option E is correct.
Now,

Thus, option B is correct