Rzabate8go Rzabate8go Math Answered B. Evaluate each expression for the given value of the variable with solution step by step.6. 4x + 6 when x = -37. X +7 when x= 9-------28. y2 - y + 4 when y = 39. 5a2 when a = -210. 2 + 8k when k = -5