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3 years ago

X² + 8x + 16 =I need the steps and the answer and the box

Mathematics

1 answer:

Juliette [100K]3 years ago

4 0

Answer:

The answer is (x+4)

Step-by-step explanation:

Just write the expression as a product with the factor x and 4

x²+2×x×4+4+16

then write the number in the exponential form with an exponent of 2

x²+2×x×4+4²

then use a² +2ab +b² = (a+b)² yo factor the expression which you get (x+4)

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3 years ago

Alvin’s age is two times Elga’s age. The sum of their age is 60. What is Elga’s age?

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3 years ago

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vodka [1.7K]

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3 years ago

A sample of 140 Vopstra customers have had their annual phone charge recorded for the previous calendar year. The data were used

taurus [48]

Answer:

Correct option: (a)

Step-by-step explanation:

A confidence interval is an interval estimate of the parameter value.

A (1 - α)% confidence interval implies that the confidence interval has a (1 - α)% probability of consisting the true parameter value.

If 100 such confidence intervals are made then (1 - α) of these intervals would consist the true parameter value.

The 92% confidence interval for the mean annual phone charge of all Vopstra customers is:

$\$470\pm \$65=(\$405, \$535)$

This confidence interval implies that true mean annual phone charge of all Vopstra customers is contained in the interval ($405, $535) with 0.92 probability.

Thus, the correct option is (a).

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4 years ago

X² + 8x + 16 =I need the steps and the answer and the box ​

X² + 8x + 16 =I need the steps and the answer and the box