Add. Write the answer in lowest terms as a mixed number.
A. 28
B. 29
C. 9
D. 30
Answer: B
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Row-reduce the matrix associated with the given system to determine whether the system of linear equations is inconsistent or has dependent equations. x + 5y = 5-4x - 20y = -20
A. Inconsistent B. Dependent
Find the area of the triangle having the given measurements. Round to the nearest square unit.A = 37°, b = 14 inches, c = 8 inches
A. 32 square inches B. 45 square inches C. 34 square inches D. 47 square inches
Simplify the expression. Assume that all variables are positive.
? 
A. 
B. 15
C. 225
D. 30
First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Sheri wanted to know the total number of hours she worked this week. Her time card indicated the following hours: Monday, 5.81 hours; Tuesday, 9.5 hours; Thursday, 5.47 hours. How many hours has Sheri worked?
A. Estimate: 20 hours; exact: 20.78 hours B. Estimate: 21 hours; exact: 21.78 hours C. Estimate: 19 hours; exact: 21.78 hours D. Estimate: 21 hours; exact: 20.78 hours