Explain how to solve these with Gauss Jordan method or through Ti-84 (rref)

Airline United American JetBlue Southwest Cost per 1,000 miles ($) 181 197 123 134 Suppose that, on a 3,000-mile New York to Los Angeles flight, United, American, and Southwest flew a total of 280 empty seats, costing them a total of $143,160. If United had three times as many empty seats as American, how many empty seats did each of these three airlines carry on its flight? United empty seats American empty seats Southwest empty seats Need Help? Read It Show My Work (Optional) ? Submit Answer 17. [-/0.12 Points] DETAILS WANEFMAC8 4.3.017. MY NOTES PRACTICE ANOTHER Investing: Inverse Mutual Funds Inverse mutual funds, sometimes referred to as "bear market" or "short" funds, seek to deliver the opposite of the performance of the index or category they track, and can thus be used by traders to bet against the stock market. This question is based on the following table, which shows the performance of three such funds as of September 30, 2021.t Year-to-Date Loss (%) SHPIX (ProFunds Short Small Cap) 17 RYURX (Rydex Inverse S&P 500) 16 RYCWX (Rydex Inverse Dow) 25 You invested a total of $11,000 in the three funds at the beginning of 2021, including an equal amount in RYURX and RYCWX. As of the end of September, your year-to-date loss from the first two funds amounted to $1,510. How much did you invest in each of the three funds? SHPIX $ RYURX $ RYCWX $ 398 NOV