Answer:
Step-by-step explanation:
<em>Speed = distance/time</em>
<u>Distance is:</u>
- 40 miles + 120 miles = 160 miles
<u>Time is:</u>
- 40/30 + 2.25 = 3.58 hours
<u>Average speed:</u>
Answer:$6.30
Step-by-step explanation:$1.80 • 3.5 =$6.30
Answer:
D. store 2 and 4
Step-by-step explanation:
1. Take a look at the pictures attached.
2.
i) the first line divides the plane into 2 regions
ii) the second line adds 2 more regions so we have 4 in total.
iii) the third line adds 3 more regions, so 4+3=7 regions
iv) the fourth line adds 4 more regions.
so the

line adds n more regions to the ones created by the previous n-1 lines.
3.





So the recurrence relation is
