Answer:
its C
Step-by-step explanation:
;););)
Answer:
Just wanted to say someone already gave you an answer of 62.7° in this question when you asked it before, they also gave a pretty good explanation!
The second and the third one are similar.
Answer:
No It's not
Step-by-step explanation:
Since
x=6 produces y=1 and y=7, the relation (6,1),(8,−3),(6,7) is not a function.
The relation is not a function.
Let the number of chemistry books be x and the number of calculus books be y
total number of books in each case is:
x+y=24
x=24-y.....i
Weight of each case:
2707.2/20
=135.36
thus
4.2x+6.0y=135.36..ii substituting i in ii
4.2(24-y)+6y=135.36
100.8-4.2y+6y=135.36
hence
1.8y=34.56
y=19.2
hence
x=24-19.2
x=4.8
thus the number of chemistry books was 4.8*20=96 number of calculus was
19.2*20
=384 books
