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kati45 [8]
3 years ago
6

Claudia records the hours she spent studying and her test scores for 5 tests. What is the correlation coefficient? What is the s

trength of the model?
Mathematics
2 answers:
xenn [34]3 years ago
6 0

Answer: D and C on ed

maxonik [38]3 years ago
3 0

0.85 and strong positive correlation

Good Luck!

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\sf{Given : 3tanx + 7 = \dfrac{2}{(1 - sinx)(1 + sinx)}}

We know that : (a - b)(a + b) = a² - b²

\implies \sf{3tanx + 7 = \dfrac{2}{1 - sin^2x}}

We know that : 1 - sin²x = cos²x

\implies \sf{3tanx + 7 = \dfrac{2}{cos^2x}}

\sf{\bigstar \ \ We \ know \ that : \boxed{\sf{\dfrac{1}{cos^2x} = sec^2x}}}

\implies \sf{3tanx + 7 = 2sec^2x}

We know that : sec²x = 1 + tan²x

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\implies \sf{2 + 2tan^2x - 3 tanx - 7 = 0}

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\implies \sf{2tanx(tanx + 1) - 5(tanx + 1) = 0}

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\implies \sf{tanx = -1 \ (or) \ tanx = \dfrac{5}{2} }

8 0
3 years ago
Triangle JKL was dilated using the rule . The image, triangle J'K'L', is the result of the dilation.
egoroff_w [7]

5 units is L'L ( I took the quiz and got it right)

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3 years ago
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