10. Kate and Sophia are selling raffle tickets for a fundraiser. Kate has sold 4 less than twice as many as Sophia.
If the two girls have sold a total of 38 tickets,
how many has each girl sold? equation and answeri

Answer d; a supplementary angle = 180°, so if that angle = 150°, y would = 30°.

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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.

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