Use the indicated property to write an algebraic expression equivalent to the given expression.-13 ? x; commutative of multiplication
A. x - (13)
B. x ? (-13)
C. 13 ? x
D. 13 - x
Answer: B
Mathematics
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Write the number in standard notation.1.9722 x 104
A. 197,220 B. 19,722 C. 78.888 D. 1972.2
Mathematics
Solve the problem.The incomes of trainees at a local mill are normally distributed with a mean of $1100 and a standard deviation $150. What percentage of trainees earn less than $950 a month?
A. 35.31% B. 40.82% C. 90.82% D. 15.87%
Mathematics
Find all the first order partial derivatives for the following function.f(x, y, z) = x2y + y2z + xz2
A. 
= 2xy; 
= x2 + 2yz; 
= y2 + 2xz
B. 
= 2xy + z2; 
= x2 + yz; 
= y2 + xz
C. 
= 2y + z2; 
= x2 + 2z; 
= y2 + 2x
D. 
= 2xy + z2; 
= x2 + 2yz; 
= y2 + 2xz
Mathematics
Find the axis of symmetry of the quadratic function.f(x) = 6x2 - 12x - 6
A. x = 1 B. x = -1 C. x = -12 D. x = 2
Mathematics