Solve the system using matrices. 7x - 5y = 2 21x - 15y = 5
A. (3, 3)
B. (2, 5)
C. No solution
D. Infinitely many solutions
Answer: C
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Solve the problem. Round your answer to the nearest tenth, if necessary.Ron takes two hr more time than Paul to mow the lawn. Working together they can mow the lawn in 
. How long does it take each of them working alone?
A. Paul: 9.1 hr; Ron: 11.1 hr B. Paul: 10 hr; Ron: 12 hr C. Paul: 8 hr; Ron: 10 hr D. Paul: 8.3 hr; Ron: 10.3 hr
Find the matrix product mentally, without the use of a calculator or pencil-and-paper calculations.
A. 
B. 
C. 
D. 
Subtract.
?
?
A. 875 B. 975 C. 946 D. 976 E. 1,075
Find the domain and range of the relation.{(9, 5), (-8, 0), (-3, -3), (14, -8)}
A. Domain = {-3, 0, 9, 14}; range = {-8, -3, 5, 14} B. Domain = {-8, 0, 5, 9}; range = {-8, -3, 14} C. Domain = {-8, -3, 9, 14}; range = {-8, -3, 0, 5} D. Domain = {-8, -3, 9, 14}; range = {0, 5}