$10,000 is invested for one year at different rates of 4% and 5% to earn a total interest of $470. How much money was invested at each rate?

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

e

step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)

what are the