Asheet of plywood was made by gluing 7 sheers of wood together. two of the sheets were 0.0625 inch thick and the rest were 0.125 inch thick. how thick was the plywood?

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

The volume of a cube is 8 in to the 3rd power. how long is each side?

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?