Answer:
B. a (n) = -3n + 13
Step-by-step explanation:
Given arithmetic sequence is: 10, 7, 4, 1, -2, ...
Here a = 10, d = 7 - 10 = - 3

For function to be linear , degree(highest power must be 1) like y=2x but here....y=constant which has a degree 0 hence not linear
It's correct...................
Answer:
Area of circle is 
Step-by-step explanation:
Formula for circumference of circle is given as,

Given that C = 15 n cm,
Substituting the value,

Solving above equation for r, divide both side by 

Simplifying,

Formula for area of circle is given as,

Substituting the value of r,

Squaring the parenthesis,

Cancelling out the common term,

Therefore, area of circle in terms of n is 