3 years ago

X2 + 6x – 7 = 0? 1) (x + 3)2 = 2 2) (x – 3)2 = 2 3) (x – 3)2 = 16 4) (x + 3)2 = 16

Mathematics

1 answer:

patriot [66]3 years ago

6 0

Answer:option d i think so~~

Step-by-step explanation:

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bekas [8.4K]

Answer:

Option 3

Step-by-step explanation:

Rewriting input as fractions if necessary:

3/8, 3/20

For the denominators (8, 20) the least common multiple (LCM) is 40.

LCM(8, 20)

Therefore, the least common denominator (LCD) is 40.

Calculations to rewrite the original inputs as equivalent fractions with the LCD:

3/8 = 3/8 × 5/5 = 15/40

3/20 = 3/20 × 2/2 = 6/40

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3 years ago

As a manager for an advertising company, you must plan a campaign designed to increase Twitter usage. A recent survey suggests t

kolbaska11 [484]

Given:
Sample proportion = 85% = 0.85.
Confidence level (CL) = 90%.
Confidence interval (CI) $\hat{p} \pm z^{*} \sqrt{ \frac{\hat{p}(1-\hat{p})}{n} } \\ where \\ n=sample\, size \\ z^{*}=1.645 \, at \, 90\% \, CL$

We want the confidence interval to be 5% or 0.05. Therefore
$0.85 - 1.645 \sqrt{ \frac{0.85(1-0.85)}{n} }=0.05 \\ 0.85 - \frac{0.5874}{ \sqrt{n} } =0.05 \\ \frac{0.5874}{ \sqrt{n} }=0.8 \\ \sqrt{n} = .7342 \\ n=0.54$

Because this number is less than 1, a default sample size of 30 (for the normal distribution) is recommended.

Answer: 30

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3 years ago

Use the whole number product and place value reasoning to place the decimal point in the second product. Explain how you know.

BARSIC [14]

The answer to ypur question is 48.24

5 0

4 years ago

Read 2 more answers

Based on the given information, what can you conclude, and why? (PLEASE HELP!)

pychu [463]

That would be the third option

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