A function is shown below. f (x) = 83 - 11
What value of x makes f (20) = 21?
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please help!

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

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

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)