Answer:

Step-by-step explanation:
this goes with BODMAS .so it means bracket of divison,multiplication ,addition and subtraction
this means that you would have to solve the one in the bracket first before you'll continue with the rest,that is the subtraction.
Um, I don't know if I actually answered the question, but I think that the second one is cheaper to rent.
Answer:
21N:7m/s
? :10m/s
21x10=210
210÷7=30N
Your final answer is 30N
Step-by-step explanation:
This is called direct propotion
it involves close multiplication
Answer:
erm
Step-by-step explanation:
25
2- 54:81, 54/81
3- 0:101, 0/101
4- 13.5:43.8, 13.5/43.8