The profit p (in dollars) from selling x calculators is p = 25x - (10x + 250). how many calculators are sold when the profit is $425?

The number of calculators that are sold when the profit is $425 is 45 so X=45

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.

It's like discovering the answer to a puzzle. the purpose in solving an equation is to find the value or values of the variable that makes it a true statement. any value of the variable that makes the equation true is called a solution to the equation.