Jo made 60 necklace
it cost £1.20 to make each necklace.
she sold 75%of the necklaces for full price of £5.
she sold the rest for half price.
what was her profit?

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?

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?