Perform the indicated operation and express the answer in simplest form.
(7
- 
)
A. 7 
- 5
B. 7 
- 5
C. 7 
- 5 
D. 6 
Answer: B
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Solve the problem.Assume that the mathematical model C(x) = 19x + 170 represents the cost C, in hundreds of dollars, for a certain manufacturer to produce x items. How many items x can be manufactured if the cost is to be kept between $739,000 and $1,100,000?
A. {x 
570 < x < 760}
B. {x 
600 < x < 800}
C. {x 
380 < x < 570}
D. {x 
400 < x < 600}
Solve the problem.A woman invested $7,000 at 6% (or 0.06) for 7 years. How much did she have in her account at the end of 7 years? 
A. $9,940 B. $2,940 C. $5,880 D. $294
Solve by the substitution method. x + 4y = 167x + 5y = 20
A. {(-4, 0)} B. ? C. {(1, 3)} D. {(0, 4)}
Find the value of the indicated trigonometric function of the angle ? in the figure. Give an exact answer with a rational denominator.
Find tan ?.
A. tan ? = 
B. tan ? = 
C. tan ? = 
D. tan ? = 