Heyy have a great day :)) also here free fries​

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 expression is equivalent to sq-80

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)