r=-29
-9
It is a linear equation in the variable r.
r2 + r - 20 = 0(r + 5)(r - 4) = 0r + 5 = 0 or r - 4 = 0r = -5 or r = 4
It's an incorrect statement. 5 plus 6 equals plus 11. Also, pi R round, cornbread R2 .
-9r = 20 + rsubtract r from both sides-10r = 20divide both sides by -10r = -2
This is the associative law for addition: If a, b, c are any numbers then: a + (b + c) = (a + b) + c
-8
12r + 4 = 112, 12r = 108, r = 9
It is 22 + R
v
r=2
|2r + 9| = 5 So 2r + 9 = 5 or 2r + 9 = -5 so that 2r = -4 or 2r = -14 r = -2 or r = -7