What is the answer to this question?

4- 7pq+3pq

4 - 4pq

combine like terms and subtract -7pq to positive 3pq and you will get 4-4pq

-18

step-by-step explanation:

because mean value defines that total sum value over total number of set

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.