Answer:
x = 2 or 3
Step-by-step explanation:
Diagonal of a rhombus bisects the vertex angles. So,
Lets factorise the eqn.
Here x will have 2 values.
1) 
2) 
Answer:
cos0 = 1
cos90 =0
so a for the first one and d for the other
Okay, well with the information given, you can not come to an answer. Is there something that shows all of the students who were in the survey?
Edit: Okay so there are 520 students in total.
We can say that the graph is equal to 520/520
However, we are trying to find how many of the 520 people voted for james. We know that James received 15% of the votes.
Now, we can find 15% of 520 by taking 15/100 times 520. The answer is 78.
