Solve the problem.If you toss four fair coins, in how many ways can you obtain at least one head?
A. 15 ways
B. 16 ways
C. 5 ways
D. 4 ways
Answer: A
Mathematics
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Express as a single logarithm and, if possible, simplify.loga22 + loga 4
A. loga 88
B. loga 22 ? loga 4
C. loga 
D. 22 loga 4
Mathematics
Use the quadratic formula to solve the equation. (All solutions are real numbers.)
= 
+ 
A. 
B. 
C. 
D. {-1}
Mathematics
Solve the system by the substitution method.y = x2 - 6x + 9x + y = 5
A. (3, 2) B. (-4, 9), (-1, 6) C. (4, 1), (1, 4) D. (4, 9), (1, 4)
Mathematics
Find the exact value of the given expression using a sum or difference formula.
A. 
B. 
C. 
D. 
Mathematics