Are AB and CD parallel, perpendicular, or neither?*
1. A(-4, 8), B(4, 10), C(1, 1), D(-2, 13)

Perpendicular

Step-by-step explanation:

Given

Required

Is AB and CD parallel?

First, we need to calculate the slope (m) of AB and CD

For AB:

So:

For CD:

So:

For Lines to be parallel, the slope must be equal:

i.e.

This condition is not true because:

For Lines to be perpendicular, the slope must be:

This implies:

Hence, the lines are perpendicular

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

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.