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Anna007 [38]
3 years ago
12

7x +2x -1 equals what

Mathematics
2 answers:
Leni [432]3 years ago
8 0
9x - 1, you can not subtract 1 from 9 because they are unspoken terms.
Lorico [155]3 years ago
4 0
7x+2x-1= 9x-1
You cant get rid of the one because its not a common term with the x-values
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Step-by-step explanation:

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4 0
2 years ago
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Solnce55 [7]

Answer:

see explanation

Step-by-step explanation:

If A +B = 45° then tan(A+B) = tan45° = 1

Expanding (1 + tanA)(1 + tanB)

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Using the Addition formula for tan(A + B)

tan(A+B) = \frac{tanA+tanB}{1-tanAtanB} = 1 ← from above

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