5x+2y=9 and 3x+5y=7 what is the solution?

To prove "p is equal to q" using an indirect proof, what would your starting assumption be?

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.