Find the slope and y-intercept of the line.9x + y = -10
A. slope = 9; y-intercept = -10
B. slope = - 
; y-intercept = - 
C. slope = -9; y-intercept = -10
D. slope = - 
; y-intercept = - 
Answer: C
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Determine which region, I through VII, the indicated element belongs.The chart that follows shows people's loyalty to specific grocery stores. In the Venn diagram given, the set indicated as Year 1 represents the set of grocery stores listed in the table under Year 1, and so on.
Charter
A. VI B. IV C. I D. II
Place the correct symbol, < or >, in the blank between the whole numbers.46 
40
A. > B. <
Evaluate the expression for the given values of x and y.
+ 
;
x = 4 and y = -1
A. 2 B. 1 C. 0 D. -1
Tank A contains 250 lbs of salt dissolved in 1000 gal of water. Tank B contains 300 lbs of salt dissolved in 1000 gal of water. The mixture from tank A is pumped to tank B at the rate of 400 gal per hr, while the mixture from tank B is pumped to tank A at the same rate. Assume that the mixture in each tank is uniform by stirring. Let A(t ) and B(t ) be the amount of salt in tanks A and B after t hours, respectively.
(a) Draw a two-compartment model for A(t ) and B(t ) . (b) Use the initial conditions A(0) = 250 and B(0) = 300 to solve for A and B. (c) What are the equilibrium values of A and B?