The diameter of a regulation soccer ball is about 8 and three-fifths inches. This number was graphed on a number line. A number line going from negative 9 to positive 9. Point A is between negative 9 and negative 8, point B is between negative 7 and negative 6, point C is between 6 and 7, point D is between 8 and 9.

Which point could be the point representing the graph of the diameter of the ball?

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Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Put the equation in slope intercept form by solving for y

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?