Answer:
D
Step-by-step explanation:
it's 100% I'm super sure
Answer:
7x+4
Step-by-step explanation:
1/2(2x+8)
=x+4
x+4+6x
=7x+4
PLS GIVE BRAINLIEST
9514 1404 393
Answer:
15/17
Step-by-step explanation:
cos(arctan(8/15)) = 15/17
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You could assume the ratio values 8 and 15 represent the opposite and adjacent sides of a right triangle. Then the hypotenuse is ...
h = √(8² +15²) = √289 = 17
The cosine is the ratio of the adjacent side to the hypotenuse, so is ...
cos(x) = 15/17
Can't take the square root of a negative so find a domain where it takes squaer root of 0 wich is allowed hold a sec

there
the denomenator can't be 0 so x cannot be 3, it has to be greater