Suppose that y varies jointly as x and Z and y = 6 when x = 5 and z = 2. What is the value of y when x = 4 and z = 3?

A)1.3
B)3.2
C)7.2
D)11.25

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?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.

Find the slope intercept form of (-3,6) and (3,-6)