On monday and tuesday, honor sent letters to her friends at sixth-grade camp. she mailed 12 of the letters on monday and 18 of them on tuesday. what percentage of the letters did she mail on monday? ( show the steps)

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?

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Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)