Answer:
Step-by-step explanation:
The diagram is given to you below. I could not change <C so that it was theta. So C = theta.
So C is the reference angle. Call it theta when you think of it. The diagram shows you how cos(C) must be set up.
The adjacent side is 7
The hypotenuse is 18
theta = C = cos-1(7/18) = 67.11
To the nearest degree 67.11 = 67
Answer:
x=2
Step-by-step explanation:
3(3x+10)=50−x
The first step is to distribute the 3
3*3x + 3*10 = 50-x
9x+30 = 50-x
Add x to each side
9x+x+30 = 50-x+x
10x+30 = 50
Subtract 30 from each side
10x+30-30 = 50-30
10x= 20
Divide each side by 10
10x/10=20/10
x =2