Multiply and simplify.
? 
A. 
B. 
C. - 
D. - 
Answer: D
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Solve using matrices.A chemist has prepared two acid solutions, one which is 6% acid by volume and the other which is 10% acid. How many cubic centimeters of each should the chemist mix together to obtain 50 cm3 of 
-acid solution?
A. 6%-solution: 3.76 cm3; 10%-solution: 46.24 cm3 B. 6%-solution: 46.24 cm3; 10%-solution: 3.76 cm3 C. 6%-solution: 25 cm3; 10%-solution: 25 cm3 D. 6%-solution: 31 cm3; 10%-solution: 19 cm3
Solve the problem. Round to two decimal places if needed.A sector of a circle has an area of 94 square feet. Find the central angle (in radians) that forms the sector if the radius is 8 feet.
A. 1.47 radians B. 2.94 radians C. 3008 radians D. 6016 radians
Solve the equation and check your solution.
+ 7 = 
A. - 
B. - 
C. 
D. 
Graph the inequality.-2x - 5y ? -10
A. 
B. 
C. 
D. 