Answer:
The cost of each book is $18.
Step-by-step explanation:
1. 12.50+2n=48.50
2, 12.50-12.50=cancels out
3. 48.50-12.50=36
4. 2n=36
5. 2n/2=n
6. 36/2=18
7. n=18
Complementary angle is 33.1
Supplementary angle is 123.1
This is because complementary angles, when added together are 90 degrees.
Supplementary angles equal 180 degrees.
<span>A formal two-column proof contains the following components:
</span><span> Statement of the </span><span>original problem
</span> Diagram, marked with "Given<span>" information
</span>Re-statement<span> of the "Given" information in the proof
</span>Complete supporting reasons<span> for each step in the proof
</span><span> The </span>"Prove"<span> statement as the last statement
</span>Conclusion
Hope this answers the question. Have a nice day.