Solve the following order of operations problems. PEMDAS. Parentheses Exponents Multiply/Divide Add/Subtract (2.99x3) + (7.15x3) + 2.50

15 - 2 to the 3rd power + 20 =

5 to the 2nd power x (5 + 5) - 20 =

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?

Which graph represents the solution set for the given system of inequalities? x+2y< 3 x+y> 4 3x-2y> 4

Is a positive integer raised to a negative power always positive