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n200080 [17]
2 years ago
11

If y=29,find x y=(x+2)(x-2) Please show working

Mathematics
2 answers:
Ainat [17]2 years ago
6 0

Answer:

x=±sqrt (33)

Step-by-step explanation:

y=(x+2)(x-2)

29=x^2-4. x^2=33, x=±sqrt (33)

Nina [5.8K]2 years ago
4 0

Answer:

\sqrt{33}

Step-by-step explanation:

y = (x+2) (x-2)

y =  x^{2} +2x -2x-4

y =  x^{2} - 4

29 = x^{2} - 4

29 + 4 = x^{2} -4 + 4

33 = x^{2}

\sqrt{33} = x

Hope this is clear and you can understand it. :)

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Answer:

The 80% confidence interval for the mean number of toys purchased each year is between 7.5 and 7.7 toys.

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