Joel made raspberry and strawberry smoothies for a party. Each raspberry smoothie uses cup of yogurt, and each

3

1

strawberry smoothie uses 1- cups of yogurt. Joel used a total

2

of 10 cups of yogurt. Let x represent the number of raspberry

smoothies made and let y represent the number of strawberry

smoothies made. Which equation represents the relationship

between the number of raspberry smoothies and the number

of strawberry smoothies Joel made?

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?