4). Evaluate these expressions for: a = +2, b = -3, c = +8 Write out the expression with numbers first. Circle 2 signs together and replace with 1 sign, then solve: a). a + b = b). a - b= c). b - c = d). 3a - b = e). a + 2b = f). c - a - b = 5). Evaluate these expressions for: m = +4, p = - 2, t = +8 Write out the expression with numbers first. Circle 2 signs together and replace with 1 sign, then solve: a). m p = b). (t - m) p = c). t (p m) = d). 2 p (t + m) = 6). Evaluate these expressions for: x = 1/3, y = 1/2, z = 1/4 Write out the expression with numbers first. a). x y = b). x y z = c). 3 x - y = d). x (z + y) =