Answer:
15
Step-by-step explanation:
Lets take the number of songs he download = x
So $1.29x = $20
So "x" = 20/4.29 = 15.5
So songs he can purchase = 15 songs
No parts are manufactures is when x=0 because it is run 0 hours
y=amount of elctricity needed
y=12(0)+24
y=0+24
y=24
24 watts are used on a day when no parts are manufactured
I would probably just do 91 times 60 since 60 min is 1 hour
In order to find out the answer , you just need to count :
Let's say that mary's collection is symbolized by x
2/3 x = 4h
x = 3/2 . 4h
x = 6h
The storybooks they have in total would be : 6h + 4h = 10 h
hope this helps
P=44.6
P=a+b+√a^2+b^2=11+15+√11^2+15^2≈44.6
