Someone me ? i keep getting skipped and not getting any helo

answer:

x=35

step-by-step explanation:

i forgot the name of the theorem, but those two angle should add up to 180°.

so

(2x + 43) + (2x-3) = 180

4x + 40 = 180

4x = 140

x = 35

answer:

x = 35

step-by-step explanation:

those 2 angles equal 180 so add them together and set the equation = 180

180 = 2x + 43 +2x -3

4x + 40 = 180

4x = 140

x = 35

Among the choices the one that  best describes her prediction is "extrapolation, because a key that is 12 keys from middle C is outside the data set". 

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