Problem 1 :
x(a + 2) = 12(x + 1)
If the above equation has no solution, what is the value of a?
Solution :
Problem 2 :
The graph shows the
sales of ice cream at a store and the average daily
temperatures for a month. Which data point
would be considered an outlier for the graph?
A) On a day
with an average temperature of 60ºF,
the store makes $2,000 in
ice cream sales.
B) On a day with an average
temperature of 70ºF, the store makes $3,000 in ice cream sales.
C) On a day with an average temperature of 75ºF, the store makes $2,000 in ice cream sales.
D) On a day with an average temperature of 80ºF, the store makes $1,000 in ice cream sales.
Solution :
Problem 3 :
f(x) = (x – 10)(x + 13)
The function f is defined by the given equation. For what value of x does f(x) reach its minimum?
Solution :
Problem 4 :
The function gives a metal ball’s height above the ground f(x), in inches, x seconds after it started moving on a track, where 0 ≤ x ≤ 10. Which of the following is the best interpretation of the vertex of the graph of y = f(x) in the xy-plane?
A) The metal ball’s minimum height was 3 inches above the ground.
B) The metal ball’s minimum height was 7 inches above the ground.
C) The metal ball’s height was 3 inches above the ground when it started moving.
D) The metal ball’s height was 7 inches above the ground when it started moving.
Solution :
Problem 5 :
In triangle JKL, cos (K) = ²⁴⁄₅₁ and angle J is a right angle. What is the value of cos (L)?
Solution :
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