Factor completely, if possible.81x2 + 16
A. (9x + 4)2
B. (9x - 4)2
C. (9x + 4)(9x - 4)
D. Prime
Answer: D
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Solve the problem.A video camera is set up 110 feet at a right angle to a straight quarter-mile race track, as shown in the figure. The starting line is to the left, and the finish line is to the right. Through what angle must the camera rotate to film the entire race?
A. 148° B. 157° C. 85° D. 167°
Solve the system using substitution.
A. (4, 7) B. all ordered pairs that solve y = 2x - 1 C. (7, 4) D. no solution
Solve the problem.A baker can decorate the day's cookie supply four times as fast as his new assistant. If they decorate all the cookies working together in 28 minutes, how long would it take for each of them to decorate the cookies working individually?
A. baker: 140 minutes
assistant: 35 minutes
B. baker: 140 minutes
assistant: 560 minutes
C. baker: 35 minutes
assistant: 140 minutes
D. baker: 8
minutes
assistant: 33 minutes
Determine whether the quantities are proportional.30 meters in 15 seconds and 80 meters in 24 seconds
A. Yes B. No