Estimate the sum as indicated. Then answer the question.Estimate the following sum by first rounding to the nearest hundred. Does the estimate give you reason to doubt the stated sum?
A. Estimate: 12,900 ; yes
B. Estimate: 12,900 ; no
C. Estimate: 12,600 ; no
D. Estimate: 12,600 ; yes
Answer: D
Mathematics
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Solve. Check for extraneous solutions.
= x + 3
A. {4} B. {7} C. {1} D. {-4}
Mathematics
Solve the system by the addition method.
A. {(-3, -8), (-8, -3)} B. {(3, 8), (-3, 8), (3, -8), (-3, -8)} C. {(3, 8), (8, 3), (-3, -8), (-8, -3)} D. {(3, -8), (3, 8)}
Mathematics
Determine the absolute value of the complex number.z = -19
A. -19 B. 38 C. 0 D. 19
Mathematics
Find length x and angle A in the illustration. Round your answer to the appropriate number of significant digits.
A. 
B. 
C. 
D. 
E. 
Mathematics