Simplify the following by combining like terms.3.9x3 - 6.4x + 11.7 + 1.2x - x3 - 8.1
A. 1.3x4
B. 3.9x3 + 7.6x + 19.8
C. 2.9x3 - 5.2x + 3.6
D. cannot be simplified
Answer: C
Mathematics
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Add or subtract as indicated. Simplify, if necessary.
- 
A. 
B. - 
C. 
D. - 
Mathematics
Write the sum without sigma notation and evaluate it.
A. 
+ 
+ 
+ 
= 10
B. 
+ 
+ 
+ 
= 
C. 
+ 
= 
D. 
? 
? 
? 
= 7
Mathematics
Express the number in scientific notation.74,000
A. 7.4 × 103 B. 7.4 × 10-3 C. 7.4 × 104 D. 7.4 × 10-4
Mathematics
Solve the problem.A tree casts a shadow 32 m long. At the same time, the shadow cast by a 67-cm tall statue is 81 cm long. Find the height of the tree. Round results to the nearest unit.
A. 39 m B. 25 m C. 26 m D. 38 m
Mathematics