Jones middle school has 850 students and gets 5 new students per month. roberts middle school has 985 students and 10 students withdrawal each month. after how many months will jones middle school have students than roberts middle school

5x + 850 = -10x + 985
+10x       = +10x

15x+850 = 985
      -850 = -850

15x=135
 /15= /15

x=9

It will take 9 months 

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle