Simplify by combining like terms -18+3(5x-2)+8

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

The jurassic zoo charges $14 for each adult admission and $5 for each child. the total bill for 77 people from a school trip was $565. how many adults and how many children went to the zoo? i

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11