20+6+10+6
30+12
which equals 42
Answer:
1 day = 24 hours
Divide each of the "number of hours spent sleeping" by the total number of hours in a day (24). Then divide the numerator and denominator by the highes common factor to reduce the fraction to its simplest equivalent.




I assume that the answer the number 13 is that he applied the principle incorrectly.
I think the correct answer is A
10x-3y=15, this will be:
(15/-3)+(-10/-3)x=y
-5+3x=y.
if you want to graph it, you will draw coefficient 3 in the graph as x=1 from x-axis and y=3 from y-axis. m=-5 in y-axis as graph intersect.
this is an exemple