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- A guitar was marked to be sold in a store for $120 and then marked down 15%. A month later it was marked down an additional 5%. If the same guitar was available online for $100, what percent could be saved by buying it at the store after the second markdown?
- Given the pair of equations A = 6C + 4 and B = –3C – 5, express the value of A in terms of B.
- If (x – 3) is a factor of the equation 3×2 – 11x + n, what is the value of n?
- Two triangular prisms are similar. The smaller one has a triangular face with an altitude of 10, and the larger one has a triangular face with an altitude of 15. If the volume of the smaller prism is 4,000, what is the volume of the larger prism?
- In the graph, the x-axis is intersected by the graph at π/2, 3π/2, 5π/2, 7π/2, and so on. The curve over anyone interval is a repetition of the other intervals. What is the period of the function?