21. Find the value of (-8u²U6 )X(-20uv) for u = 2.5 and v = 1.

Step-by-step explanation:

(-8×2.5×2×1×6) ×(-20×2.5×1)

(-20×16) ×(-50)

-320×-50

=1600

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1