8. 7.6 + (-7.1) = what does it equal plz help

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

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

Find the zeros of each function. f(x) = 6x^2 - 7x - 20