Simplified would be 2a+2b
3 cm on the map represents 31.5 km in reality.
3cm : 31.5 km
1cm : 31.5/3 km
1cm : 10.5km
So the scale on the map is 1cm represents 10.5 km.
Your multiplying by -4 each time
-1x-4=4
4x-4=-16
-16x-4=64
In fix fraction it will be, 1 7/8
and the exact answer is 15/8
and in decimal from it will be, 1.875
Answer:
s= -2
Step-by-step explanation: