Solve the problem.There are 6 singers in a competition. In how many ways can first, second, and third prizes be awarded?
A. 18
B. 20
C. 120
D. 216
Answer: C
Mathematics
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Solve the system of equations graphically using a graphing calculator. Find all values to the nearest tenth.y = -2x + 1xy = -4
A. x = -1.2, y = 3.4; x = 1.7, y = -2.4 B. x = -1.7, y = 4.4; x = 1.2, y = 1.2 C. No solution D. x = -1.2, y = 3.4
Mathematics
Use the rules for exponents to rewrite the expression and then evaluate the new expression. (72)-1
A. 
B. - 
C. -14
D. -49
Mathematics
Translate the sentence to an equation using the variable x. Then solve the equation.A number minus 2 equals 4.
A. x - 2 = 4; 6 B. x = 2 - 4; -2 C. 2 - x = 4; -2 D. x = 4 - 2; 2
Mathematics
Solve the system.
+ 
+ 
= - 
- 
- 
=
- 
+ 
+ 
= - 
A. {(3, 2, 2)}
B. {(-3, -2, -2)}
C. {(-3, -2, 2)}
D. 
Mathematics