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3 years ago

Factor the expression.49×2-16

Mathematics

1 answer:

MArishka [77]3 years ago

8 0

Answer:

49x²-16 = (7x - 4)(7x + 4)

Step-by-step explanation:

Your "49×2-16" is incorrect; did you mean "49x^2-16" or "49x²-16?"

This last expression is the difference of two squares.

The formula for that is a² - b² = (a - b)(a + b), and so your 49x²-16 factors as follows:

49x²-16 = (7x - 4)(7x + 4)

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Step-by-step explanation:

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3 years ago

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3 years ago

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Nezavi [6.7K]

Answer:

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Step-by-step explanation:

The expected value of a random variable <em>X</em>, often denoted as E(<em>X</em>), indicates the probability-weighted average of all possible values/events. The general formula of expected value is

$\mathrm{E(\textit X \mathrm)} = \displaystyle\sum_{\mathclap{i=1}}^{k} \ X \times P(X) \\ \\ \\ = X_{1} \times P(X_{1}) \ + \ X_{2} \times P(X_{2}) \ + \ X_{3} \times P(X_{3}) + \ \cdots \ + X_{k} \times P(X_{k})$ .

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$\mathrm{E(\textit X \mathrm)} \ = \ 1 \times 0.35 \ + \ 2 \times 0.2 \ + \ 5 \times 0.1 + \ 8 \times 0.2 \ + 10 \times 0.15 \\ \\ = \ 4.35 \ \ (\mathrm{nearest \ hundredth})$ .

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2 years ago

Factor the expression.49×2-16​

Factor the expression.49×2-16