Simplify the expression.(5 - 2)(4 + 6) + 52
A. 25
B. 55
C. 3
D. 10
Answer: B
Mathematics
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Evaluate the expression.3-2
A. -9
B. 9
C. 
D. 
Mathematics
Evaluate the integral.
A. - ln 
+ 
ln 
- 3 tan-1 (sin t) + C
B. ln 
- ln 
- 5 tan-1 (sin t) + C
C. - ln 
+ 
ln 
- 3 tan-1 t + C
D. - ln 
+ 
ln 
+ C
Mathematics
Divide.0.21 ÷ 0.007
A. 30 B. 3 C. 0.03 D. 0.3
Mathematics
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. Find the equation of the least-squares regression line that models the data. 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. y ? 0.930 + 44.3x B. y ? 1.86 + 88.6x C. y ? 44.3 + 0.930x D. y ? 88.6 - 1.86x
Mathematics