An isosceles triangle has angle measures of 50, 50, and 80. the side across from the 80 angle is 10 inches long. how long are the other sides

With alll of except for the 2 that i did already

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Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18