Maria has books that she wants to arrange in piles. The books have different thicknesses. This line plot shows the thickness of each book. She piles the four thinnest books on top of each other. How thick is the pile?

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?