Divide 103.2 tonnes in the ratio 5:3​

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

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Given that abcd is a rhombus, what is the value of x?