Factor completely.z4 + 4z2 + 4
A. (z2 + 2)2
B. (z - 2)2
C. (z2 - 2)2
D. (z + 2)2
Answer: A
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Find the particular solution to the given differential equation that satisfies the given conditions.2
+ 11
+ 15y = 0; Dy = 0 and y = 4 when x = 0
A. y = - 20e-3x + 24e(-5/2)x B. y = 20e-3x - 24e(-5/2)x C. y = 24e-3x - 20e(-5/2)x D. y = - 20e3x + 24e(5/2)x
Solve the problem.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. By using linear regression, the following function is obtained: 
where x is the number of hours spent in the lab and y is grade on the test. Use this function to predict the grade of a student who spends 13 hours in the lab. Number of hours spent in lab Grade (percent) 10 96 11 51 16 62 9 58 7 89 15 81 16 46 10 51
A. 64.4 B. 60.4 C. 75.6 D. 67.0
If a system of two equations has infinitely many solutions, then the lines representing these two equations: ___________________.
What will be an ideal response?
Fill in the blank with one of the words or phrases listed below.
A set of ordered pairs is called a(n) 
.
A. range B. relation C. domain D. function