1. Given (9, 12) is a point on the terminal side of θ, find cos θ.
2. Evaluate cos θ when sin θ = -3/8 and θ is in Quadrant IV.
3. Given (6, 8) is a point on the terminal side of θ, find sin θ.
(Please help me with these, this is for my final and I need to turn it in today and I don't understand these last 3 problems)

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Adaycare center charges a $75 enrollment fee plus $100 per week. which of the following represents the cost of sending a child to daycare for 14 weeks?

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2