Find the difference.42.71 - 29
A. 13.81
B. 71.71
C. 13.71
D. 14.21
Answer: C
Mathematics
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Simplify the expression.(-7x6y4z)2
A. 49x12y8z2 B. -49x12y8z2 C. 14x12y8z2 D. -7x8y6z
Mathematics
Solve the problem.A plane flies 420 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 30 mph, what is the speed of the plane in still air?
A. 275 mph B. 285 mph C. 290 mph D. 310 mph
Mathematics
Find the LCD for the pair of rational expressions.
, 
A. 48(x - 10)(x - 4) B. (x - 10)(x - 4) C. x - 4 D. 48
Mathematics
Use Cramer's rule to find the solution of the system, if possible.
a. x = 2, y = -2
b. x = 5, y = -12
c. The system is inconsistent.
d. The equations are dependent.
Mathematics