Use the Pythagorean theorem. The equation for this right triangle would be a^2+b^2=c^2. Since you have one leg and the hypotenuse, you can plug these into the equation. It would be 7^2+b^2=12^2. Do the exponents. You will get 49+b^2=144. You need to get b by itself so subtract each side by 49. You get the equation b^2=95. Square root each side to get b=9.746. This rounds to 9.7. So the answer is A. Hope this helps! ;)
Monomials are the expressions with one terms.
A.) 
Since, it has only one term. Therefore, it is a monomial.
B.) 
Since, it has two terms. Therefore, it is not a monomial.
C.) 
Since, it has only one term. Therefore, it is a monomial.
D.) 
Since, it has only one term. Therefore, it is a monomial.
E.) 
Since, it has only one term. Therefore, it is a monomial.
F.) 
Since, the variable is in the power. So it is not a monomial.
G.) 
Since, the power is not a integer. Therefore, it is not a monomial.
Answer:
29 degrees
Step-by-step explanation:
Both angles are the same.