Answer:
right angle
Step-by-step explanation:
It has a 90 degrees angle
Answer:
,
,
.
Step-by-step explanation:
The magnitude is an absolute value by definition. Hence, each element has the respective value:

Answer:

Step-by-step explanation:



equation has infinitely many solutions has the same number on both sides of the equal sign
-3x -21 + x + 5 = -20x -16
-2x -16 = -20x -16
so either you have -18x on the left or +18x in the right