Add expressions 4-2/ 3b +1/4 a and 1/2 a +1/6 b -7 what is the simplified sum

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Write an expression that represent sarah’s total pay last week.represent her hourly wage with w monday 5 tuesday 3 wednesday 0 noah hours wednesday 8 only with w wage did noah and sarah earn the same amount last week?

Which of the functions graphed below has a removable discontinuity?