Simplify the complex fraction: 
a. 
b. 
c. 
d. 
a.
Mathematics
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Solve the problem.Suppose that z varies jointly with x and y and that z = 343 when x = 7 and 
Find the constant of proportionality k. Then, find z when x = 7 and y = 8.
A. k = 2.9; z = 162.4
B. k = 33,614; z = 
C. k = 3.9; z = 218.4
D. k = 3.5; z = 196
Mathematics
Graph the inequality on a number line.x ? 5
A. 
B. 
C. 
D. 
Mathematics
Find the reciprocal.
A. - 
B. 
C. 
D. 
Mathematics
Simplify the expression. Assume that all variables are positive.
? 
A. x8/81
B. 
C. x
D. x8/9
Mathematics