Sarah’s party costs $600 for up to 30 people plus $40 for each extra person. Sarah’s party cost $1600 in all. How many people came to the party?
(The answer is 55 but I need step by step help on how to solve it)

Uestion 1(multiple choice worth 5 points) (05.02)alex wants to paint one side of his skateboard ramp with glow-in-the-dark paint, but he needs to know how much area he is painting. calculate the area of the isosceles trapezoid. isosceles trapezoid with top base 12 feet, bottom base of 18 feet, and height of 6 feet. 72 ft2 84 ft2 90 ft2 108 ft2