1. Which equation best represents the model below? 1 point
ООО
-7 + 9 = 16
-7 + 9 = 2
7+-9= -2
7+-9 = -16

Ivan and jeff buy a package of 8 pens for $4.00. ivan wants 5 of the pens, and jeff wants 3.how much should each student pay?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

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?