Determine if each ordered pair is a solution to the given system of inequalities in two variables.xy = 1-7x - y = -8 (i) 
; (ii) 
A. (i) Yes; (ii) Yes
B. (i) Yes; (ii) No
C. (i) No; (ii) Yes
D. (i) No; (ii) No
Answer: A
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In the indicated voting system, the weights represent, in order, voters A, B, C, and so on. Identify the dictator if there is one, and identify those voters with veto power if there are any.[15 : 1, 2, 3, 3, 4, 5]
A. Voter F is a dictator; voter F has veto power. B. No dictator; voter F has veto power. C. No dictator; voters E and F have veto power. D. Voter F is a dictator; no voters have veto power.
It makes sense that the larger the area of a region, the larger the number of species that inhabit the region. Many ecologists have modeled the species-area relation with a power function and, in particular, the number of species S of bats living in caves in central Mexico has been related to the surface area A measured in 
of the caves by the equation
S = 0.7A03
(a) The cave called mission impossible near puebla, mexico, has suface area of A=90m2.
How many species of bats would expect to find in that cave?
(b) If you discover that 5 species of bats live in cave estimate the area of the cave.
Solve the problem.A cab company charges a base rate of $2.00 plus 20 cents per minute. Let y be the cost in dollars of using the cab for x minutes. Find the slope-intercept form of the equation.
A. y = 2.00x - 0.20 B. y = 0.20x + 2.00 C. y = 0.20x - 2.00 D. y = 2.00x + 0.20
Simplify the radical expression by factoring out the largest perfect nth power. 
A. 2
B. 2
C. 5
D. 4