14. 6.4 blocks
15. 1.78
16. 7.47
Answer:
Answer is $800 assuming that no tax is being applied
L = 8 + T
L = 2T
You can combine them
2T = 8 + T
T = 8
If Tim walked 8, Lisa walked twice as much which is 16
Answer:
Grace should use her phone for 58 minutes to maintain an average of 55 minutes.
Step-by-step explanation:
Usage of first month = 43 minutes
Second month = 62 minutes
Third Minutes = 57 minutes
Let, the usage of fourth month = k minutes
Mean of the data = 5 minutes
Now, Average of a Data = 
⇒
or, 55 x 4 = 162 + k
⇒ 220 - 162 = k
or, k = 58 minutes
So, Grace should use her phone for 58 minutes to maintain an average of 55 minutes.