To estimate, round 3102 to 3100
round 1-10 to 2500
1-70 to 2100
1-80 to 2900
2900+2100+2500+3100=10600mi
Yes it is reasonable because you add and subtract numbers when estimating, however it is not exact
The answer is 10.
4 a + 5 b when a = 4 and b = - 1.2
Answer:
the answer is 30
............................
Answer:
6. b
7. d
8. a
9. c
10.around 40
Step-by-step explanation:
no idea but i think i did my best
