Chapter 2 Self Test
Press
for True and
for False.
1) Solve for x: 8x - 2 = 13 - 2x.
2) Use a graphing utility to approximate the solution(s) of 1/2 (x2 - 9x + 19) = 0
3) Multiply: (3 + 7i)(6 - 2i).
4) 3x2- 6x + 2 = 0 has imaginary zeros.
5) Use the cost equation, C(x)= 0.5x2 + 15x + 6000, to find the number of units, x, that a manufacturer can produce with a total cost, C, of $13,700.
6) Use the discriminant to determine the number of real solutions: 5x2- 7x + 16 = 0.
The equation has exactly one real solution .
7) The revenue for selling x units of a product is R = 4.50x. The cost of producing x units is 3x + 3717. In order to obtain a profit, the revenue must be greater than the cost. For what values of x will this product return a profit?
8) The domain of sqrt(36 - x2) = [-6, 6]
9) Use a graphing utility to solve 2x2 + 3x < 5.
10) When doing a linear regression , a r value of -1 means there is an
excellent correlation.
11)
This scatter plot has a negative correlation
.
12) The graph of : y = x3 - 2x 2- 3x
has 3 x-intercepts.
Note: if you did well on this, then submit the chapter quizzes
and proceed to chapter 3. If not, email me,
or post mesages to the webboard.