Solve for the variable.-2y - 7 - 3(y + 1) = 6y - 7
A. y = 6
B. y = - 
C. y = - 
D. y = 
Answer: C
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The function s = f(t) gives the position of a body moving on a coordinate line, with s in meters and t in seconds.s = 8t2 + 4t + 5, 0 ? t ? 2Find the body's speed and acceleration at the end of the time interval.
A. 20 m/sec, 2 m/sec2 B. 41 m/sec, 16 m/sec2 C. 36 m/sec, 16 m/sec2 D. 36 m/sec, 32 m/sec2
Multiply.(9m - 2w)(9m + 2w)
A. 81m2 + 36mw - 4w2 B. 81m2 - 36mw - 4w2 C. 81m2 - 4w2 D. 9m2 - 2w2
Refer to the figure in following problems. Answer True or False.
1. AB\\CD
2. m? = m?3
3. m?1+m?3 = m?ADC
4. AB = CD
5. m?2 = 40°
Solve the problem.The formula P = 14.7e-0.21x gives the average atmospheric pressure, P, in pounds per square inch, at an altitude x, in miles above sea level. Find the average atmospheric pressure for an altitude of 2.3 miles. Round your answer to the nearest tenth.
A. 11.0 lb/in.2 B. 7.8 lb/in.2 C. 9.1 lb/in.2 D. 8.4 lb/in.2