Let x be a number. Translate the English phrase or sentence into a mathematical expression. Subtract 18 from a number
A. 18x
B. 18 - x
C. x - 18
D. 18
Answer: C
Mathematics
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Solve the problem.A bathroom scale is compressed 
in. when a 180 lb person stands on it. Assuming that the scale behaves like a spring that obeys Hooke's law, how much does someone who compresses the scale 
in. weigh?
A. 45 lb B. 135 lb C. 90 lb D. 360 lb
Mathematics
Find all the second order partial derivatives of the given function.f(x, y) = 
A. 
= - 
; 
= 
; 
= 
= 
B. 
= - 
; 
= 
; 
= 
= 
C. 
= - 
; 
= 
; 
= 
= 
D. 
= 
; 
= - 
; 
= 
= 
Mathematics
Without using a calculator, determine whether the first number is divisible by the second number.Is 198,819 divisible by 9?
A. Yes B. No
Mathematics
Write the domain of the rational function in interval notation.f(x) = 
A. (-?, ?)
B. (-?, -1) ? 
? 
C. 
? 
? (1, ?)
D. (-?, -1) ? 
? 
Mathematics