Solve.Karen went shopping for holiday presents for her family. She spent $321 on Monday, $347 on Tuesday, and $193 on Wednesday. What is the total amount of money that she spent on gifts?
A. $961
B. $861
C. $771
D. $871
Answer: B
Mathematics
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Convert the units.0.66 g = 
mg
A. 0.00066 mg B. 0.0066 mg C. 660 mg D. 66 mg
Mathematics
Simplify the expression. Write the result using positive exponents only.(x-2y5)-2
A. 
B. 
C. 
D. 
Mathematics
Solve the system of equations by the substitution method.
A. (0, 6) B. (5, -4) C. infinite number of solutions D. no solution
Mathematics
Solve by graphing. Label the axes and show where the solution is located on the graph.Suppose y = mx + b is a mathematical model for actual time as a function of estimated time, where y represents actual time and x represents estimated time and m and b are constants. If m = 0.7 and b = -4.5, find y when x is 15 min.
A. 18.15 min B. 15 min C. 11.85 min D. 6 min
Mathematics