The answer is C.
When a positive and negative number are multipled or divided, the result is negative.
Answer:

Step-by-step explanation:

Multiply the row of the first matrix to the column of the second matrix





simplifying them we get

Answer:
yes, you got it correct
Step-by-step explanation:
Answer:
Y = 60 degrees and X = 12
Step-by-step explanation:
x+3 and 15 are congruent so x+3 = 15, 12+3 = 15 therefore x = 12
y = 60 vertically opposite angles are equal. :D