Write a formula for the nth term of the arithmetic sequence. Use the formula to find the 20th term of the sequence.29, 24 , 19, 14, . . .
A. an = -5n + 29; a20 = -71
B. an = 5n - 29; a20 = 71
C. an = -5n + 34; a20 = -66
D. an = 5n - 34; a20 = 66
Answer: C
Mathematics
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Find the indicated probability. Round your answer to 6 decimal places when necessary.A family has five children. The probability of having a girl is 0.5. What is the probability of having 3 girls followed by 2 boys?
A. 
B. 
C. 
D. 
Mathematics
Solve the equation.
+ 
= - 2
A. 
B. 
C. 
D. 
Mathematics
Find an equation of variation in which the following are true.y varies jointly as x and z; y = 360 when x = 12 and z = 24
A. y = 
B. y = 
C. y = 
xz
D. y = 103680xz
Mathematics
If f is one-to-one, find an equation for its inverse.f(x) = x3 + 7
A. f-1(x) = 
B. f-1(x) = 
- 7
C. f-1(x) = 
D. Not a one-to-one function
Mathematics