Answer:
14
Step-by-step explanation:
2x-9=x+5
+9 +9
2x=14+x
-x -x
x=14
Answer:
x=40
Step-by-step explanation:
y=kx
36=16k
k=9/4
y=9/4 x
90=9/4 x
x=40
<span>Answer is C.
Explanation :-
Take the 1st case where Number of student(n) = 3 and Cost per student(c) is 24, we get n*c = 72
Take the 2nd case n = 6 and c =12, we get n*c = 72
Take the 3rd case n = 9 and c = 8, we get n*c = 72
By above observation we can say that product of Number of student and cost per student is 72 always.
Now for n = 12 we have to calculate c
n*c = 72
c = 72/12 = 6.
hence answer is option C.</span>