Question

if you don't know the answer don't answer​

Answer 1

1)m-2

=2-2

=0

2)3m-5

=(3×2)-5

=6-5

=1

3)9-5m

=9-(5×2)

=9-10

=-1

4)3m²-2m-7

=[(3×2)×(3×2)]-(2×2)-7

=(6×6)-4-7

=36-4-7

=36-(4+7)

=36-11

=25

5)5m/2×4

=(5×2)/2×4

=10/2×4

=20

Answer 2

Answer:

$1) \: m - 2 \\ = 2 - 2 = 0 \\ \\ 2)3m - 5 \\ = 3 \times 2 - 5 = 1 \\ \\ 3)9 - 5m \\ = 9 - 10 = - 1 \\ \\ 4)3m {}^{2} - 2m - 7 \\ = 36 - 4 - 7 = 25 \\ \\ 5) \frac{5m}{2} 4 \\ = \frac{10}{2} 4 = \frac{18}{2}$

Hope it helps you