Solve the problem.Suppose that the manufacturing cost of a precision instrument is approximated by 
where x is the cost of materials and y is the cost of labor. Find 
A. 182
B. 231
C. -4
D. 19
Answer: D
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Use the substitution method to solve the system.3x - 3 = yy - 3x = 3
A. Infinitely many solutions B. (3, 3) C. (0, 0) D. No solution
Divide. Write the answer in lowest terms and as a whole or mixed number where possible.
÷ 1
A. 
B. 1
C. 
D. 
Solve the problem.Ken is 6 feet tall and is walking away from a streetlight. The streetlight has its light bulb 14 feet above the ground, and Ken is walking at the rate of 4.1 feet per second. Find a function, d(t), which gives the distance Ken is from the streetlight in terms of time. Find a function, 
, which gives the length of Ken's shadow in terms of d. Then find 
. What is the meaning of 
?
A. (S ? d)(t) gives the time in terms of Ken's distance from the streetlight. B. (S ? d)(t) gives the length of Ken's shadow in terms of his distance from the streetlight. C. (S ? d)(t) gives the length of Ken's shadow in terms of time. D. (S ? d)(t) gives the distance Ken is from the streetlight in terms of time.
Add or subtract, as indicated, and simplify the result.
+ 
A. 
B. 
C. 
D. 