Multiply.(x + 11)(x - 11)
A. x2 - 121
B. x2 + 22x - 121
C. x2 - 22
D. x2 - 22x - 121
Answer: A
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Refer to the figure with B the midpoint of side 
and E the midpoint of side 
.
If CD = x ? 2, AF = 2x ?2, and BE = x +4 , find x.
(a) 6 (b) 12 (c) 18 (d) 24
Find the multiplicative inverse, or reciprocal.12
A. 
B. 1
C. -12
D. - 
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 equation is obtained: 
where x is the number of hours spent in the lab and y is grade on the test. Use this equation to predict the grade of a student who spends 8 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. 80.6 B. 73.7 C. 69.7 D. 75.3
Solve for the variable.-7(x - 1) - (-8x - 8) = -2
A. x = 17 B. x = 13 C. x = 9 D. x = - 17