Answer:
Step-by-step explanation:
You have to do $0.10x$250= total cost of miles
Then see how many times $21 can fit into $115= total amount of days
He rode 9/10 mile
2/5 mile = 4/10 mi
1/2 mi = 5/10 mi
4/10 + 5/10 = 9/10 mi
10 less than 5 times the value of a number -> 5a - 10
10 times the quantity of 12 more than one-fourth of a number -> 10(12+1/4a)
We have :
5a - 10 = 10(12 + 1/4a)
5a - 10 - [10(12 + 1/4a)] = 0
5a - 10 - (120 + 5/2a) = 0
5a -10 - 120 - 5/2a = 0
Group : (5a-5/2a) - (10 + 120) = 0
5/2a - 130 = 0
5/2a = 130 -> a = 130 : 5/2 = 52
Recheck : 5 x 52 - 10 = 250
10 x (12 + 1/4 x 52) = 10 x (12 + 13) = 10 x 25 = 250
I think 3.323 units would be the correct answer. Are you asking what the length of a single side is?