Problem 1 :
Which of the following equations is the most appropriate linear model for the data shown in the scatterplot?
A) y = -1.9x - 10.1
B) y = -1.9 + 10.1
C) y = 1.9x - 10.1
D) y = 1.9x + 10.1
Solution :
Problem 2 :
The graph of y = f(x) is shown, where the function f is defined by f(x) = ax^{3} + bx^{2} + cx + d and a, b, c, and d are constants. For how many values of x does f(x) = 0?
A) One
B) Two
C) Three
D) Four
Solution :
Problem 3 :
Vivian bought party hats and cupcakes for $71. Each package of party hats cost $3, and each cupcake cost $1. If Vivian bought 10 packages of party hats, how many cupcakes did she buy?
Solution :
Problem 4 :
Bacteria are growing in a liquid growth medium. There were 300,000 cells per milliliter during an initial observation. The number of cells per milliliter doubles every 3 hours. How many cells per milliliter will there be 15 hours after the initial observation?
A) 1,500,000
B) 2,400,000
C) 4,500,000
D) 9,600,000
Solution :
Problem 5 :
Which expression is equivalent to 6x^{8}y^{2} + 12x)^{2}y^{2}?
A) 6x^{2}y^{2}(2x^{6})
B) 6x^{2}y^{2}(x^{4})
C) 6x^{2}y^{2}(x^{6} + 2)
D) 6x^{2}y^{2}(x^{4} + 2)
Solution :
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