6.40x+9.90(154-x)=1230.90
Solve for x
X=84 for child
154-84=70 for adults
If vector A⃗ has components Ax and Ay and makes an angle θ with the +x axis, then tanθ = Ay/Ax to get the angle of the vector components. Since the trigonometric function of tanθ is sinθ over cosθ, and since sinθ = y/r and cosθ = x/r.
Answer: Use a math calculator it should help. If not sorry. :/
Step-by-step explanation: