Apet store has 7 tanks of fish. each tank has k fish. using k, write an expression for the total number of fish in the store.

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

How are sas and sss used to show that two triangles are congruent?

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?