Fill in the blank with one of the words or phrases listed below. 
A letter used to represent a number is called a(n) 
.
A. constant
B. variable
C. solution
D. numerical coefficient
Answer: B
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Determine whether the given function satisfies a Laplace equation.f(x, y) = 
A. Yes B. No
A small country consists of four states. The population of State A is 67,200, the population of State B is 78,300, the population of State C is 73,800, and the population of State D is 80,700. The total number of seats in the legislature is 100.Under Jefferson's method, the apportionments to each state are
A. State A: 22 seats; State B: 26 seats; State C: 24 seats; State D: 26 seats. B. State A: 23 seats; State B: 26 seats; State C: 24 seats; State D: 27 seats. C. State A: 22 seats; State B: 26 seats; State C: 24 seats; State D: 28 seats. D. State A: 22 seats; State B: 26 seats; State C: 25 seats; State D: 27 seats. E. none of these
Does the system have one solution, no solution, or an infinite number of solutions?x + y = 4x + y = 9
A. One B. No Solution C. Infinite number
Graph the equation.y = 
x
A. 
B. 
C. 
D. 