Answer:
the first one
8x+5
Step-by-step explanation:
10x-2-2x+7= 8x+5
Answer:
6
Step-by-step explanation:
6 divided by 4 = 1 + 2 leftover
6 divided by 5 = 1 + 1 leftover
Answer:
Orginal Speed is 135
Step-by-step explanation:
The ratio of final speed: original speed is

We know that 90 km is it final speed so, we set up a proportion

