Solve the problem.Bengisu was pregnant 274 days and 264 days for her first two pregnancies. In order for Bengisu's average pregnancy to equal a national average of 266 days, how long must her third pregnancy last?
A. 242 days
B. 260 days
C. 269 days
D. 268 days
Answer: B
Mathematics
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Solve the problem.A balloon is rising vertically at a distance of 
from an observer. When the angle of elevation is 
it is changing at a rate of 
How fast is the balloon ascending?
A. 5.6 ft/s B. 3.0 ft/s C. 3.3 ft/s D. 2.8 ft/s
Mathematics
Provide an appropriate response.
Solve the system of equations using any method: 
x - 
y = 5x + 5y = -28
A. (-6, 2) B. (18, 6) C. (2, -6) D. (6, 18)
Mathematics
Perform the indicated operation and express in lowest terms.
+ 
- 
A. 
B. 
C. 
D. 
Mathematics
Write the number in standard form.Six hundred thirty-eight thousand, nine hundred ninety-seven
A. 638,997,000 B. 638,977 C. 638,000 D. 638,997
Mathematics