Which is better a 8 pound bag of dog food for 7.40 or a 4 pound bag of dog food for 5.38

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

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