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21 October, 10:56

Garcia wrote the equation y=-0.2x^2+5x-8 to model the path of a soccer ball. What is true about the expression - 0.2x^2+5x-8?

A. The express has a leading coefficent of 5.

B. The express has a constant of 2.

C. The express has 3 terms.

D. The expression has a factor of - 0.2x^2.

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Answers (1)
  1. 21 October, 10:58
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    Step-by-step explanation:

    A. The leading coefficient is the number on the highest degree term. We have a 2nd degree polynomial because of the power of 2 on the x. That's what leads this polynomial off. So the leading coefficient is the number stuck to that x-squared term. Our leading coefficient is a -.2, not 5. 5 is the linear term.

    B. The constant is the number that doesn't have a variable stuck to it. Our constant, then, is - 8, not 2.

    C. The expression does in fact have 3 terms. Each term is separated from the other terms by either a plus sign or a minus sign. A polynomial with 3 terms is called a trinomial.

    D. The expression actually factors to x = 1.718 ... and x = 23.281 ... Neither one of those is the factor given in the statement.

    The only one that is true is C.
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