On a trip to the beach, Anh traveled 50 miles on the highway and 10 miles on a coastal access road. He drove three times as fast on the highway as on the coastal road. If Anh spent 30 minutes driving on the coastal road, how many minutes did his entire trip take? a-50 b-70 c-80 d- 90 e-100

Total time taken = 80 min

Step-by-step explanation:

Given:

Travel on highway = 50 miles

Travel on coastal road = 10 miles

Time spend on coastal road = 30 minutes

Find:

Total time taken

Computation:

Speed on coastal road = 10 / 30

Speed on highway road = 3[10 / 30]

Speed on highway road = 1 mi/m

Time taken on highway road = 50 / 1

Time taken on highway road = 50 min

Total time taken = 50 + 30

Total time taken = 80 min

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80