490=10·40+15x
490=400+15x
90=15x
x=6
he worked a total of 46 hours
C. 9
explanation: just look where it matches up
Answer: D) 49.86
276.99 x .18 (or 18%) = 49.8582
Http://www.chegg.com/homework-help/questions-and-answers/determine-bifurcation-value-s-one-parameter...
Im not allowed to copy and paste answers so here is a link that will give you the answers
3 and a half hours i assume. so, 60 times 3 is 180, then divide by 2 to get your half, which is 30 now add that to 180. You have 210. She will travel 210 miles in 3 and a half hours. :)