18
You can, if you have a square with side 5 you can multiply 5*5=25 or you can add 5+5+5+5+5=25 If you want to do this just take one of the numbers and add it to itself the other numbers times. so if you have 7*8 you add 7 to itself 8 times, so add 8 7's 7+7+7+7+7+7+7+7=56 or add 7 8's 8+8+8+8+8+8+8=56 Multiplying is much easier.
-25
29
you just add 6x+9x to get 15x then minus 25 from 18 to get -7 thus the answer will be 15x-7
9 and -2
-25
6:45 am to 12:00 noon is 5:15 hours and add to it 7:25 to get 12:40 hours
5x - 7=18 you add the seven to 18 and get 25 then you divide 25 by 5 to get x by itself and you will get 5 x=5
There are infinitely many possibilities: 25 (square of numbers: 3, 4, 5, ... ) 23 (add 7 to previous number) 22 (add 7, then 6, then 5, ...) 24 (add 7, then 8, then 9, ...) and so on.
You can first make it into a mixed fraction of -7 32/100 and simplify the 32 over 100, which gives you 8/25. Then your answer could be -7 and 8/25. But if you need it in an improper fraction, then you multiply -7 and 25 and add 8. This gives you -167/25.
yes. add all sides together to find the perimeter. 7+8+10=25.
the next number in the sequence is 25............starting at the beginning, you add the odd numbers to the existing number to get the answer. Add "1" to 0, get 1; add "3" to 1, get 4; add "5" to 4, get 9; add "7" to 9 to get 16........and add "9" to 16 to get 25.........