Lee is going to make chili for a football party. It will take 1 hour and 10 minutes to prepare all the ingredients and assemble them in the pot. Then, the chili will need to simmer for 1 hour. What is the latest time Lee can start preparing the ingredients if the chili needs to be ready at 1:15 P. M.?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

2x minus y equals 6, x plus y equals negative 3

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.