Answer:
The answer is A.
Step-by-step explanation:
You have to apply :

So for this question :



To find this, you'd just add 13 to -2. So -2 + 13 = 11. So the starting temperature was 11 degrees.
A+B: the matrix with same dimension a A and B, the element in row i and column j is: Aij+Bij
Same for A-B, but with Aij-Bij
120$ <span>is 75% , so what is 120$'s 100% ?</span>
120 divided by 75 = 1.6
1.6 multiplied by 100 = 160 $
The original price is 160$.