Answer:
170
Step-by-step explanation:

If a number, x, is increased by 40 (+40) and is now equal to 210 (=210), then the number, x, is equal to 170.
Oof. Sorry I can't help you there
Answer:
3
Step-by-step explanation:
(5÷5)+1+(6÷6)
1+1+(6÷6)
1+1+1
3
Answer:
.1km
Step-by-step explanation:
The tractor can move .01 km in a second so 10 times .01 is .1
so the tractor can move .1km every 10 seconds