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What is the common difference for this arithmetic sequence? -6,-2,2,6,10 a.4 b.5 c.3 d.6

How do you figure out which order to do two step equations in? like which thing do you subtract/add/multiply/divide first? i understand that you do the opposite of whatever's shown on the opposite side, but when?

Manuel drives 300 miles to orlando fl. he drives at 50 mile per hour. after driving for two hours he takes 15 minutes break two hours after his first break he takes a 30 minutes break the he drive for two hours more including the two breaks how long does it take manuel to drive to orlando