1) (4x + 5y) (-0.5)= 4x(-0.5) + 5y*(-0.5)= -2x - 2.5y
2) -2/5(5a + 1/2b)= -2/5 5a - 2/5 * 1/2b= -2a - 1/5b
1) (4x + 5y) (-0.5)
= 4x(-0.5) + 5y*(-0.5)
= -2x - 2.5y
2) -2/5(5a + 1/2b)
= -2/5 5a - 2/5 * 1/2b
= -2a - 1/5b