Triangle fgh is an equilateral triangle with fg=x+5,gh=3x-9,and fh=2x-2 . find x and the measure of each side

If a =6, what is the value of 2a(3b + 5c)?

Compare the subtraction problems 6/8 - 5/8 = 1/8 and 6/9 - 7/9 = 1/9 why is the answer to the first problem positive and the answer to the second problem negative

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