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create an equivalent system of equations using the sum of the system and the first equation. −3x + y = 12 x + 3y = 6

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Determine the solution for mc001-1.jpeg

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