The value of z varies jointly with x and y. if z=4 when y=20 and x=10, find the value of z when x=2 and y=68 1. z=2/3
2. z=17
3. z=0.50
4. z=2.72

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