Solve the system of equations by the substitution method.
A. (4, -4)
B. (-4, -3)
C. (3, -3)
D. no solution
Answer: A
Mathematics
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Use rational exponents to simplify. Write the answer in radical notation if appropriate.
A. 81x2
B. 3x2y2
C. 3x2
D. 3x4y
Mathematics
Find the product.
? 
A. 
B. 
C. 3 - b
D. 
Mathematics
Solve. Write a mixed numeral for the answer.At a track and field event, an athlete recorded the following heights at the high jump: 84
in., 83
in., 83
in., and 85 in. Find the average of the four jumps.
A. 84
in.
B. 84 in.
C. 84
in.
D. 84
in.
Mathematics
Solve.How many ways can a president, vice-president, secretary, and treasurer be chosen from a club with 10 members?
A. 24 B. 40 C. 210 D. 5040
Mathematics