So 70 students had bought lunch because 70% of 100 is 70. Now take away 60% of that and you get 42.
There are two -main- approaches to answer this problem. By using the sine identity, or applying law of sines.
We'll do the sine trig. identity, as it is the most effective.
Given an angle '

' in a right triangle, '

' is defined as the opposite side of the triangle to the given angle, over the triangle's hypotenuse.
So, for this setup:

Now, we solve for x:
So, answer is 3.4
Answer:
36
Step-by-step explanation:
With no parenthesis
Answer:
Step-by-step explanation:7c
1. a. 0=0, 4x=4x, -18=-18
b. 3
2.a. 0=-2, 2= 0
b. 2