(1)solve this system using the substitution method: 5x + 3y = 2; -5x –y =10(2) solve this application problem using a system of equations: 32,000 people attended a ballgame at a stadium that offers two kinds of seats: general admission and reserved. the day's receipts were $200,000. how many people paid $13.00 for reserved seats, and how many paid$4.00 for general admission?

The federal reserve controls certain interest rates in the united states. investors often try to speculate as to whether the federal reserve will raise or lower rates and by how much. suppose a company conducts extensive interviews with financial analysts, and as a result, predicts that "thefed" will increase rates by an average of 0.25 percentage points every six months for the forseeable future. which type of equation could be used to model the predicted interest rates over the next several years, assuming no other significant changes? a) a linear equation b) a quadratic equation c) a polynomial equation d) an exponential equation

If 7x=9y, y/z = 7/5 , then x/z = (a) 2/7 (b) 7/9 (c) 9/5 (d) 9/7 (e) 5/9

Which is an x-intercept of the graphed function? (0, 4) (–1, 0) (4, 0) (0, –1)