Naomi's Cafe has regular coffee and decaffeinated coffee. This morning, the cafe served 2 regular coffees and 18 decaffeinated coffees. What percentage of the coffees served were regular? Write your answer using a percent sign (%). PLSSS ANSWER QUICKLY ​

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

f(x) = y

f(-3) = -5

step-by-step explanation:

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