6. In the diagram of AABC, points D and E are on sides AB and CB respectively, such that DE || AC. If DB = X, EB = x + 3, AB = 14 and CB = 21,
what is the length of AD?

Asmall foreign car gete 42 miles per gallon and user 35 gallons on a trip. gasoline costs $1.05 per gallon. what was the cost of gasoline per mile driver?

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?