What is the domain of g?

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Use the distributive law to multiply. 3(4x + 5y + 6)

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827