Find the sum of the first n terms of the following arithmetic sequence.a1 = -12, d = -1; n = 5
A. -60
B. -17
C. -70
D. 7
Answer: C
Mathematics
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Determine whether the points A, B, and C form a right triangle.A = (-8, 3); B = (-5, 3); C = (-5, 12)
A. Yes B. No
Mathematics
Find the indicated term of the geometric sequence.a12 when a1 = -3 and r = 2.
A. 19 B. -6144 C. -6140 D. -12,288
Mathematics
Solve the system graphically. Give x- and y-coordinates correct to the nearest hundredth.y = log (x + 7)y = x3
A. {(2.07, .69)} B. {(-2.50, 1.49)} C. {(-1.83, 1.64), (1.68, 2.16)} D. {(0.97, 0.90)}
Mathematics
Decide if the given ordered pair is a solution to the inequality.2x + 3y < 5: 
A. Yes B. No
Mathematics