Solve the problem.Ashley's grades on her first 3 exams are 85, 78, and 77. An average greater than or equal to 80 and less than 90 will result in a final grade of B. What range of grades on Ashley's fourth and final exam will result in a final grade of B? The maximum grade is 100.
A. 80 ? x ? 100
B. 70 ? x ? 90
C. 80 ? x < 120
D. Impossible to get a B.
Answer: A
Mathematics
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Write the first four terms of the sequence.an = (-1)n+1
A. a1 = -1, a2 = 1, a3 = -1, a4 = 1 B. a1 = 1, a2 = 1, a3 = 1, a4 = 1 C. a1 = -1,a2 = -1, a3 = -1, a4 = -1 D. a1 = 1, a2 = -1, a3 = 1, a4 = -1
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Find 
by implicit differentiation.
?
?
A. 
B. 
C. 
D. 
Mathematics
Solve the equation.
= 7
A. 
B. 
C. {7}
D. {49}
Mathematics
Find Pk+1 from the given statement Pk.Pk: (k - 1)2 + 2k = k2 + 1
A. Pk+1: k2 + 2(k + 1) = k2 + 2 B. Pk+1: k2 + 2(k + 1) = (k + 1)2 + 1 C. Pk+1: (k + 1)2 + 2(k + 1) = (k + 1)2 + 1 D. Pk+1: k2 + 2k + 1 = (k + 1)2 + 1
Mathematics