Determine the slope and the y-intercept. Then graph the equation.3x - 4y = -25
A. m = - 
; y-intercept: 
B. m = - 
; y-intercept: 
C. m = 
; y-intercept: 
D. m = - 
; y-intercept: 
Answer: C
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Factor the four-term polynomial by grouping.15x2 + 18x + 20x + 24
A. (3x - 4)(5x - 6) B. (15x - 4)(x - 6) C. (3x + 4)(5x + 6) D. (15x + 4)(x + 6)
A tank initially contains 150 lb of salt dissolved in 400 gal of water. Saltwater containing 5 lb of salt per gal enters the tank at the rate of 5 gal per min. The mixture (kept uniform by stirring) is removed at the same rate. How many pounds of salt are in the tank after an hour?
What will be an ideal response?
Determine the least-square error when the line y = 2x + 2.5 is used to approximate the data points 
and (6, 15).
Fill in the blank(s) with the appropriate word(s).
Solve the system of equations by elimination.
A. x = 3, y = 8; (3, 8) B. x = 2, y = 9; (2, 9) C. x = 3, y = 9; (3, 9) D. x = 2, y = 8; (2, 8)