Rationalize the denominator.
A. -7 - 2
B. 7 - 2
C. 7 + 2
D. 2
- 7
Answer: D
Mathematics
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Write the first four terms of the binomial expansion.(x + 4)20
A. x20 + 3040x19 + 3040x18 + 145,920x17 B. x20 + 80x19 + 3040x18 + 18,240x17 C. x20 + 760x19 + 3040x18 + 72,960x17 D. x20 + 80x19 + 3040x18 + 72,960x17
Mathematics
Find the probability.A card is dealt from a 
deck. What is the probability of not being dealt a 3?
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.An average score of 90 for 5 exams is needed for a final grade of A. John's first 4 exam grades are 79, 89, 97, and 95. Determine the grade needed on the fifth exam to get an A in the course.
A. 90 B. 100 C. 85 D. 95
Mathematics
Solve the equation.
= 
A. 
B. 
C. 
D. 
Mathematics