Answer:
18.8
Step-by-step explanation:
3t - 4(t - 5) + 5 (plug in 6.2 as t)
3(6.2) - 4(6.2 - 5) + 5 (distribute 3 to 6.2)(subtract 5 from 6.2)
18.6 - 4(1.2) + 5 (multiply -4 and 1.2)
18.6 - 4.8 + 5 (subtract 4.8 from 18.6)
13.8 + 5 (add 13.8 and 5)
18.8