Please help me!! Amy has 18 marbles. Four of her marbles are red and the rest are black.
What is the ratio of the number of black marbles to the number of red marbles?

14:4

Step-by-step explanation:

First u would find how much black are left then u would put it in a ratio black to red which is what I put up there

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: