Let the unknown number be x
13x+72= -23x
13x+23x= -72
36x= -72
x= -2
Step-by-step explanation:
Vertical Angles: Angles facing each other.
Example: 6 & 7
Complementary Angles: Angles adding up to 90 degrees / making a right angle.
Example: 9 & 10
Supplementary Angles: Angles adding up to 180 degrees / making a straight line.
Example: 7 & 8
postive or greater6 7 8 9 10
negative or less 4 3 2 1 0
25% = 1/4
4 × 4 =16
0.5 × 4 = 2
16 + 2 = 18
4.5 × 4 =18
the baby's body length 18 inches
