If the graphs of the linear equations shown below are perpendicular, what is the value
of a?
y = 3x + 8
2y = ax - 5

Avegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide. find the total area of the vegetable garden and path

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

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?