Use the partial sum formula to find the partial sum of the given arithmetic sequence.Find the sum of the first 30 terms of the arithmetic sequence {-2n - 5}.
A. -1080
B. -990
C. -1050
D. -885
Answer: A
Mathematics
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Express the expanded form as a Hindu-Arabic numeral.(9 × 106) + (5 × 105) + (4 × 104) + (8 × 103) + (5 × 102) + (9 × 101) + (6 × 1)
A. 46 B. 9,548,596 C. 460 D. 388,800
Mathematics
Use the graph of the function to estimate the x-intercepts.g(x) = -8x2 + 18x + 5
A. x = -0.25, x = 2.5 B. x = 5, x = 18 C. x = -2.5, x = 0.25 D. x = 0.25, x = 2.5
Mathematics
Suppose a and b are real numbers other than zero and that 
. State whether the inequality is true or false.
?
?
A. False B. True
Mathematics
Find the direction angle ? for the given vector. Let 0° ? ? < 360° and round ? to the nearest tenth when appropriate.
A. 225° B. 315° C. 270° D. 45°
Mathematics