Determine whether the equation defines y as a function of x. y = |x|
A. function
B. not a function
Answer: A
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(2a/3b)/(14b2c/15a2c) =
a. 7a3b-3c/17 b. 2ab3c2/7 c. 5a3b3c/7 d. 5a3b-3c/7 e. 5a3b-3/7
Solve the equation using the multiplication property of equality.-4x = -24
A. {20} B. {6} C. {2} D. {-20}
Solve.Mike works on commission selling electronic equipment. The linear function 
describes his annual income I when his total sales for the year are s. At what level of sales will Mike's income be $41,700?
A. $3,600,000 B. $36,000 C. $360,000 D. $371,000
Solve.Regrind, Inc. regrinds used typewriter platens. The variable cost per platen is $1.70. The total cost to regrind 100 platens is $400. Find the linear cost function to regrind platens. If reground platens sell for $10.90 each, how many must be reground and sold to break even?
A. C(x) = 1.70x + 230; 19 platens B. C(x) = 1.70x + 400; 44 platens C. C(x) = 1.70x + 230; 25 platens D. C(x) = 1.70x + 400; 32 platens