Evaluate.30
A. 0
B. 3
C. 1
D. -1
Answer: C
Mathematics
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Multiply.
? 
A. 3x4
B. 
C. x4
D. 
Mathematics
Find the difference.-4 - (-19)
A. -23 B. 15 C. -15 D. -4
Mathematics
Use front-end rounding to round each number. Then, multiply the rounded numbers to get an estimated answer. Finally, find the exact answer.estimateexact
?
A. Estimate: 20; exact: 19.61 B. Estimate: 199; exact: 195.1 C. Estimate: 200; exact: 196.1 D. Estimate: 201; exact: 197.1
Mathematics
Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, give the solution with y arbitrary.4x - 2y - 10 = 08x + y - 25 = 0
A. ?
B. 
C. 
D. 
Mathematics