What is the determinant of a=
–30
–4
30
60

Therefore the correct option is third

i.e determinant A i.e |A| = 30

Step-by-step explanation:

Given:

To Find:

determinant A i.e |A| = ?

Solution:

Determinant A is given as

Therefore the correct option is third one i.e determinant A i.e |A| = 30

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

answer: idk wbu

step-by-step explanation: umm..