Find the inverse of the matrix, if it exists.A = 
A. 
B. 
C. 
D. 
Answer: D
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Let x represent the number. Use the given conditions to write an equation. Solve the equation and find the number.The graph shows the number of people in Country A without health insurance from year 0 through year 3. 
In year 0, there were 25 million people in Country A without health insurance. This number has increased at an average rate of 4.1 million people per year. In what year will the number of people in Country A without health insurance first reach 100 million?
A. year 21 B. year 18 C. year 19 D. year 20
Use mathematical induction to prove the following.0.04n < 0.04n-1
What will be an ideal response?
Solve the system of equations by the substitution method. x - 3y = -30-5x - 4y = -2
A. {(-7, 9)} B. {(6, 9)} C. {(-6, 8)} D. ?
Find an for the given geometric sequence.
, 
, 
, 
, . . .
A. an = 
n - 1
B. an = 
n
C. an = 
- 
(n - 1)
D. an = 
+ 
(n - 1)