Laurence started with 30 pieces of candy and gave away x pieces. Beatriz started with 70 pieces of candy and gave away five times as many as Laurence did.
Beatriz and Laurence now have the same number of pieces of candy. How many pieces
of candy did Laurence gave away?
F
40
100
H
10
J
20

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?

2x minus y equals 6, x plus y equals negative 3

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.