Write an equation that expresses the relationship. Use k for the constant of proportionality.x varies directly as the square of y and inversely as the cube of z.
A. x = 
B. x + y2 - z3 = k
C. xy2z3 = k
D. x = 
Answer: D
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Provide an appropriate response.The Terrific Tile company always takes 16% extra tiles when they go out on a job. The job they are working requires 1,250 tiles. How many tiles did they take for this job?
A. 200 B. 1,050 C. 1,450 D. 78
Solve the problem.The price of a desk was 5y. During a sale, the price was reduced by $40. The store sold 8x desks during the first week of the sale. Write an expression with parentheses to represent the value of the desks sold during the first week. Then use the distributive property to write the expression without parentheses.
A. 5y(8x - 40) = 40xy - 200y dollars B. 8x(5y - 40) = 40xy - 320x dollars C. 8x(5y - 40) = 40xy - 40 dollars D. 8x(5y - 40) = 40xy - 320 dollars
Decide whether the relation is a function, and give the domain and range.
A. Not a function; domain: (-?, ?); range: (-?, 5] B. Not a function; domain: (-?, 5]; range: (-?, ?) C. Function; domain: (-?, ?); range: (-?, 5] D. Function; domain: (-?, 5]; range: (-?, ?)
Find A-1, if it exists.A = 
A. 
B. 
C. Does not exist
D. 