Answer:
4.472135955
Step-by-step explanation:
I used a Calculator

Answer:15+2.50(10x3)=x
Step-by-step explanation:
She would have to score atleast a 74 on the test for her average to be 78
Here, f(x) = kx
k = f(x)/x
k = 48/8
k = 6
So, when x = 2,
f(x) = 6 * 2
z = 12
In short, Your Answer would be: 12
Hope this helps!