3-6: real-world combinations and compositions of functions
independent practice
1. the student government association is selling roses for valentine's day to raise money for their trip to the star
convention. the cost of each rose is $1.25 and the florist charges a delivery fee of $15. the class plans to ser
roses for $4.00 each
define the variable.
b. write a cost function.
c. write a revenue function.
d. write a profit function.

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno step statement reason 1 ∠oln ≅ ∠lno given 2 draw oe as a perpendicular bisector to ln by construction 3 ∠leo ≅ ∠neo transitive property of equality 4 m∠leo = 90° definition of a perpendicular bisector 5 m∠neo = 90° definition of a perpendicular bisector 6 le ≅ en definition of a perpendicular bisector 7 δole ≅ δone side-angle-side (sas) postulate 8 ol ≅ on cpctc nina made two errors in the proof. identify and correct the errors.