Determine the viewing window used.
A. 
B. 
C. 
D. 
Answer: A
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Use the determinant feature of a graphing calculator to solve the system by Cramer's rule . (Round to one decimal place.)1.5x - 0.3y - 4.8z = -1.45.4x - 7.0y + 1.7z = -5.04.8x - 1.7y + 0.7z = 11.0
A. {(6.8, 7.2, 2.3)} B. {(13.6, 14.5, 4.5)} C. {(3.4, 3.6, 1.1)} D. {(27.3, 28.9, 9.0)}
One morning, John drove 12 hours before stopping to eat. After lunch, he increased his speed by 10 mph. If he completed a 440-mile trip in 14 hours of driving time, how fast did he drive in the morning? ?
A. 26 mph B. 30 mph C. 38 mph D. 23 mph E. 33 mph
Simplify the algebraic expression.-7x + 3(4x - 7)
A. 19x + 21 B. 5x + 21 C. 19x - 21 D. 5x - 21
A fair coin is tossed 150 times. Find the probability of observing exactly 75 heads.
A. 0.067 B. 0.0067 C. 0.796 D. 0.0651 E. none of these