At lunchtime, a man called his wife from his office to tell her that they needed to switch vehicles so that he could use the family van to pick up some building materials after work. The wife then left their home, traveling towards his office in their van at 32 mph. At the same time, the husband left his office in his car, traveling towards their home at 47 mph.If his office is 47.4 miles from their home, how long will it take them to meet so that they can switch vehicles?
A. 0.3 hr
B. 1.1 hr
C. 0.6 hr
D. 1.6 hr
E. 2.6 hr
Answer: C
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at x = 1
A. - 
B. - 
C. - 
D. - 
Solve the problem.The side of a square equals the length of a rectangle. The width of the rectangle is 4 meters longer than its length. The sum of the areas of the square and the rectangle is 240 square centimeters. Find the side of the square.
A. 12 cm B. 10 cm C. 100 cm D. 2 cm
Find the length of the third side of the right triangle. Where appropriate, give both an exact answer and an approximation to three decimal places.
A. 
= 90.0
B. 
? 6.928
C. 180
D. 
? 13.416
Find the inverse of the matrix (if it exists).
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?
?
A. ?
B. ?
C. ?
D. ?
E. ?