How do you find a average out of a set of numbers?

Who long does it take to drive 150 miles at 45 miles per hour

He trapezoid is composed of a rectangle and two triangles. what is the area of the rectangle? what is the total area of the triangles? what is the area of the trapezoid? ? a) 42 cm2; 27 cm2; 69 cm 2 b) 54 cm2; 27 cm2; 81 cm 2 c) 108 cm2; 27 cm2; 135 cm 2 d) 108 cm2; 13.5 cm2; 121.5 cm 2

Stephanie runs three days a week. she ran 3 2/3 miles on monday , 4 1/5 miles on wednesday , and 2 2/9 miles on friday. how many miles did she run this week ?