Perform the indicated operations.Estimate by first rounding to the nearest hundred, then find the actual difference.
A. Estimate: 400
Actual: 389
B. Estimate: 900
Actual: 400
C. Estimate: 300
Actual: 389
D. Estimate: 400
Actual: 400
Answer: C
Mathematics
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Simplify the expression.
5 (q ? 0)
A. 
B. 
C. 
D. 
Mathematics
Write an algebraic expression for the quantity. Let x represent the unknown value.The sum of ten times a number and nine.
A. 9x + 10 B. 10x + 9 C. 9(x + 10) D. 10(x + 9)
Mathematics
Provide an appropriate response.Solve the following system algebraically: 
Fill in the blank(s) with the appropriate word(s).
Mathematics
Determine whether the ordered triple is a solution of the system.(-3, -1, 4)
A. Yes B. No
Mathematics