A collection of nickels, dimes, and quarters consist of 11 coins with a total of $1.35. If the number of dimes is equal to the number of nickels, find the number of each type of coin.

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

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