Im not sure but I think the answer is most likely...
D) 10.
Hope I helped :-)
You just combine like terms
So 4d + - d = 3d
And 3x + 2x = 5x
So the answer is 3d + 5x
For the very last part, a is 29 and b is 45.
To prove that tan(u - v) does not equal tan u - tan v, we start by assuming values for u and v.
To do this, we assume the following values


So, we have:

Substitute the assumed values for u and v

Subtract 45 from 75

Using a calculator, calculate the values of tan(30), tan(45) and tan(75)
So, we have:

Subtract 1 from 3.7321

Notice that the expression on the left-hand side and the expression on the right-hand side are not equal.
Hence,
is true
Read more about proofs of trigonometry at:
brainly.com/question/22698523
C. 212 degrees Fahrenheit