Atruck with a heavy load drove from boston to new york at 45 mph. after unloading, it returned from new york to boston at a speed of 65 mph. what was its average speed for the whole trip? btw its not 55 plz ! < 3

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years

Evan went to the park and saw for animals each animal was either a duck or dog if he saw a total of 14 legs how many of each animal did he see