Help me please thanks!

D

Step-by-step explanation:

We are dealing with system of equations and can use graphing, elimination, or substitution. However, the equation is set up in a way such that it will be easier to use elimination. You can add the two equations and in doing so you will see the x and -x cancel out. The remaining equation is 2y = 0. So, y = 0. Substitute that into one of the equations and you get that x = 3. Therefore your answer is "D".

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