y now? Solution: Let the brother's age be B. Sarah's age = 3B. In five years: Sarah: 3B + 5 Brother: B + 5 Equation: 3B + 5 = 2(B + 5) Solve for B: 3B + 5 = 2B + 10 3B - 2B = 10 - 5 B = 5 Sarah's age = 3 5 = 15 Answer: Sarah is 15, and he
their domains, and ranges. Transformations of graphs, including translations, reflections, and stretches. Composite and inverse functions. Trigonometry Basic identities and equations. Graphs of sine, cosine, and tangent
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