Find the first term and the common difference for the arithmetic sequence.S9 = - 45, a9 = -9
A. a1 = 71, d = -2
B. a1 = -1, d = -1
C. a1 = 71, d = -1
D. a1 = -1, d = -2
Answer: B
Mathematics
You might also like to view...
Determine whether the integration formula is correct. 
dx = x(sin-1 x)2 - 8x + 2
sin-1 x + C
A. Yes B. No
Mathematics
Find the area of the region under the graph of the function f on the interval 
.
?
; 
What will be an ideal response?
Mathematics
Solve the problem.A race car driver's speed is clocked at 142.042 mph at the end of her first lap, and at 160.505 mph at the end of the next lap. How much faster was she driving at the end of the second lap than at the end of the first?
A. 17.463 mph B. 18.563 mph C. 18.463 mph D. 18.473 mph
Mathematics
Graph the system of inequalities.x - 2y ? 2 x + y ? 0
A. 
B. 
C. 
D. 
Mathematics