Callie was billed $416.48 for car repairs. she will pay the service center in 4 equal monthly installments from her bank account. what is the net change in her bank account balance after each monthly payment? the net change to callie’s bank account is -$416.48. the negative sign indicates money leaving callie’s account. which rational number represents the number of months that callie has to pay off the bill? what does the sign on the number mean?

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?