In marissa's calculus course, attendance counts for 20% of the grade, quizzes count for 15% of the grade, exams count for 45% of the grade, and the final exam counts for 20% of the grade. marissa had a 100% average for attendance, 93% for quizzes, 86% for exams, and 81% on the final. determine marissa's course average.

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.