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2 years ago

Consider the equation: X^2+16x-2=11 1) Rewrite the equation by completing the square

Mathematics

2 answers:

Alexxandr [17]2 years ago

4 0

Answer:

$(x+8)^{2}$ =77

x= -8 +/- $\sqrt\\ 77$

From Khan Academy

Iteru [2.4K]2 years ago

3 0

3x^2-x(3-x)=0
3x-4(x +4)=2
3x-1^=5

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9.4 The heights of a random sample of 50 college stu- dents showed a mean of 174.5 centimeters and a stan- dard deviation of 6.9

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$x\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=(174.5\pm 2.326\times \dfrac{6.9}{\sqrt{50}})\\\\=(174.5+2.26,174.5-2.26)\\\\=(176.76,172.24)$

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