<u><em>Answer: r=12.3 *The answer must have a positive sign or decimal point.*</em></u>
Explanation:
First, you had to do is add 17.1 from both sides of an equation.

And then, simplify by equation.

You can also add by the numbers.


Hope this helps!
Should be Q, because it is more than 121, but less than 144. 121 is 9 away from 130, and 144 is 14 away. So, the answer would be
B) Q
Answer: 6
Step-by-step explanation:
Answer:

Step-by-step explanation:
Using the Quotient rule:

We can subtract the exponents of x and y:

Therefore, 
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Answer:
See below.
Step-by-step explanation:
We know that
tanA + tan B
tan (A + B) = ---------------------
1 - tanAtanB
Substituting for A + B
tan (A + B) = tan pi/4 = 1.
tanA + tan B
So ------------------ = 1
1 - tanAtanB
Therefore tanA + tan B = 1 - tanAtanB.