Question

срочно нужно номер 2

Answer 1

1) $4a + 5b = 4 \times ( - 0.3) + 5 \times 0.8 = - 1.2 + 4 = 2.8$
2) $4a + 5b = 4 \times 1.2 + 5 \times ( - 0.2) = 4.8 - 1 = 3.8$

2.8<3.8