3. definition of supplementary angles
5. defintion of congruency
6. substitution <em>(refer to statements 3 and 5)</em>
Answer:
b
Step-by-step explanation:
6
Answer:
30+ 15 =45
Step-by-step explanation:
(3×10)+15 =45
Answer:
9x-14
Step-by-step explanation:
7 times 2 is 14, and 5x plus 4x is 9x so it is 9x-14