in the coordinate plane , points ( x , 2 ) and ( 10 , y ) are on line k . if line k passes through the origin and has slope 1 / 2 , then x + y =
"line k passes through the origin and has slope 1 / 2 means that its equation is y = 1 / 2 * x . thus : ( x , 2 ) = ( 4 , 2 ) and ( 10 , y ) = ( 10,5 ) - - > 4 + 5 = 2 + 5 = 9 . answer : c ."
multiply(multiply(10, const_4.0), divide(2, 2))