Simplify the expression.9a - 5a + 4
A. 4a + 4
B. 14a + 4
C. 8a
D. -4a + 4
Answer: A
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Use simple probability to complete the exercises.Use the spinner below to answer the question. Assume that it is equally probable that the pointer will land on any one of the five numbered spaces. If the pointer lands on a borderline, spin again. Find the probability that the arrow will land on 1 or 5. 
A. 1
B. 3
C. 
D. 
Perform the indicated operation(s). Simplify if possible.
+ 
A. - 
B. 
C. 
D. 
Simplify the expression. Assume that all variables are positive.
? 
? 
A. a1/4 B. a12/23 C. a4/15 D. a23/12
The length of each edge of a cube is 17 cm, with a possible error in measurement of 0.02 cm. Use differentials to estimate the error that might occur when the volume of the cube is calculated. ?
A. An error is approximately ±16.68 cm3. B. An error is approximately ±17.34 cm3. C. An error is approximately ±16.95 cm3. D. An error is approximately ±17.65 cm3.