Simplify the expression. Assume that all variables are positive when they appear.
A. x9
B. 
C. x7
D. x
Answer: C
Mathematics
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Solve the problem.The figure below shows an addition pyramid, in which each number is the sum of the two numbers immediately below. 
For the incomplete addition pyramid below, show that the values in the square can be determined by forming and solving an equation in the unknown variable shown. 
What will be an ideal response?
Mathematics
Determine the area of the shaded region in the figure. Use 3.14 for ? if necessary.?
A. 3.14 sq. cm B. 9.42 sq. cm C. 12.56 sq. cm D. 1 sq. cm
Mathematics
Provide an appropriate response.Known quantities in an equation are represented by letters.
A. True B. False
Mathematics
Divide and write the result in standard form.
A. 
+ 
i
B. 
+ 
i
C. 
- 
i
D. 
+ 
i
Mathematics