Use the partial sum formula to find the partial sum of the given arithmetic sequence.Find the sum of the first 40 terms of the arithmetic sequence: -10, -6, -2, 2, . . . .
A. 2652
B. 2450
C. 2720
D. 2800
Answer: C
Mathematics
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At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Less than 17 seconds
A. 2.5% B. 84% C. 97.7% D. 98%
Mathematics
Find the value of the expression.log7 76
A. 6 B. 6log77 C. 76 D. 1
Mathematics
Write an equation of the line with the indicated slope and y intercept.Slope = - 
; y intercept = -5
A. y = -5x + 
B. y = 
- 5
C. y = -5x - 
D. y = - 
- 5
Mathematics
Find an equation for the line with the given properties.Slope undefined; containing the point 
A. y = 4
B. x = - 
C. y = - 
D. x = 4
Mathematics