Find the number of those 4-digit numbers whose digits are non-increasing.

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?

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?