Is the product of 18 negative numbers and 20 positive numbers a positive number or negative

positive

Step-by-step explanation:

even negatives = positive

whatever positives = positive

positive*positive = positive

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

answer:

c 60% on edg