There is no solution for the first one
if you eliminate y you get 2 equations
-13x - 13z = -25
-13x - 13x = -15
- there is no solution to theses
a23 means the element in the second row and the 3rd column
so its -5
From this question I take it that you need to know what is 130% of 45 mg. 130% of 45 is equal to 1.3x45, which is 58.3. So, your answer is 58.3 mg of the vitamin.
Tan(35)=x/12
x=12*tan(35)=8.40
Here we go again lol
Answer: Experimental probability of landing on white = 177/1000.
Theoretical probability of landing on white = 1/5.
The larger the amount of spins, the greater the likelihood that the experimental probability will be close to the theoretical.
