Hanai invested $20,000, part at 3% interest and part at 5% interest. the
investment returned $800.

a. what is the system of equations that represents this situation?

b. how was the original $20,000 investment split between the two interest
rates?

c. how would the investment need to be split to make more than $800?
how do you know?

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?

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]