Answer:
C
Step-by-step explanation:
Perpendicular means the new equation's slope is -1/4
point slope equation:y-y1=m (x-x1)
y-7=-1/4(x+3)
Answer:
Radius of the convergence is R = 
and,
The Interval of convergence is 
Step-by-step explanation:
Given function : Σ(21x)^k
Now,
Using the ratio test, we have
R = 
or
R = 
or
R = 
now,
for convergence R|x| < 1
Therefore,
< 1
or

and,
Radius of the convergence is R = 
and,
The Interval of convergence is 
Answer:
.8
Step-by-step explanation:
Keywords
linear equation, variables
Step 1
Define the <u>variables</u>
Let
x-----> number of erasers
y-----> total cost
we know that

------> this is the <u>linear equation</u> that represent the situation
therefore
the answer is
