Find an equation of variation in which the following are true.y varies jointly as x and w and inversely as z, and y = 
when x = 2, w = 3, and z = 42.
A. y = 
B. y = 34xwz
C. y = 
D. y = 
Answer: A
Mathematics
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Find the area of the triangle. Approximate values to the nearest tenth when appropriate.base = 6 in., height = 12 in.
A. 72 in.2 B. 36 in.2 C. 18 in.2 D. 144 in.2
Mathematics
Solve.4 ? x = 24
A. 96 B. 5 C. 24 D. 6
Mathematics
The function f is one-to-one. State the domain and the range of f and f-1. Write the domain and range in set-builder notation.f(x) = 
A. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
B. f(x): D is all real numbers, R is all real numbers;
f-1(x): D is all real numbers, R is all real numbers
C. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
D. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
Mathematics
Solve the equation by extracting the square roots.2(x - 2)2 = 7
A. x = 
B. x = 2 - 
or x = 2 + 
C. x = -
or x = 
D. x = -2 - 
or x = -2 + 
Mathematics