|2r + 9| = 5 So 2r + 9 = 5 or 2r + 9 = -5 so that 2r = -4 or 2r = -14 r = -2 or r = -7
0.875 is a terminating decimal and as a fraction it is 7/8
12-2r = 10
4r2-25 = (2r)2-52 = (2r-5)(2r+5)
2r-1=9 2r =10 r =5
11
2r + 5 - - 1 When simplified: 2r + 6
2r
If it stops there as 0.7 then it is a terminating decimal number
Terminating?
If: 7 -2r = 13 Then: r = -3
If: -7 = 7-2r Then: r = 7