The first one is a parabola opening sideways so it will not pass the vertical line test
B not a function as it can be arranged in form x = expression in y^2 so it would be a one-to-many relation.
D is a function because its a parabola which open upwards so it will pass the vertical line test
you know he made 5 deliveries for $16 each. 5*16=80. So to find his salary you have 215-80=$135.
So he makes $135 no matter what plus $16 times the number of deliveries.
so, S=16d+135
Answer:
Step-by-step explanation:
Apply the cosine double angle identity to get:
Cos 2PI/3
