Which expression is equal to the polynomial below?

2x^4 + 5x^3 - 8x - 20

A.) x3 (2x + 5) + 4 (2x - 5)

B.) x3 (2x + 5) - 4 (2x + 5)

C.) x3 (2x - 5) - 4 (2x - 5)

D.) x3 (2x + 5) + 4 (2x + 5)

Find the answer in vertex form. y=x^2-6x+7

Ten 10s equal one thousand true or false

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Hi do I find the value of a vatiable

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Corsi et al. (2007) conducted a study of the factors mediating whether injection drug users enter a drug treatment program. In their sample of 491 drug users, 38.1% were single; 27.5% were married or had a partner; and 34.

The sum of 3 consecutive even numbers is 42. The sum can be respresented by n + (n+2) + (n+4) = 42. What does n represent?