It is 84. multply 10 and 5, then add the rest. hope i could help!
40 according to google calculator
-/7? imagine that there is an -1 as the numerator. so now -/7 turns into -1/7
None of these are correct, if it is asking for a number (x) divided by 45 the correct answer would be x/45
260 + 353.6 = 613.6 that's your answer