Mark is 4 times as old as his son James. The sum of their ages is 50. What is Mark's Age?

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

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4