3 years ago

Write the following expression as a trinomial in standard form. 3(x+3)2 – 2(x + 3) +4

Mathematics

1 answer:

cestrela7 [59]3 years ago

4 0

Answer:

4(x+4)

Step-by-step explanation:

multiply the numbers

3(x+3)×2 - 2(x+3) +4

collect like terms

6(x+3) - 2(x+3) +4

Factor the expression

4(x+3)+4

Add the numbers

4x + 12 +4

4x + 16

4(x+4)

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Number of Text Messages a Day A random sample of n = 755 US cell phone users age 18 and older in May 2011 found that the average

Alexeev081 [22]

Answer:

The 95% confidence interval is (29.54 - 53.46}

Step-by-step explanation:

given data:

$\hat X = 41.5$

Se = 6.1

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a) best estimate $\hat x = 41.5$

b) at 95% confidence interval

$\alpha = 1- 0.95 = 0.05$

$\alpha /2 = 0.025$

$z_{\alpha/2} = z_{0.025} = 1.96$

at 95% confidence interval for [/tex]\mu[/tex]

$\hat x \pm z_{\alpha /2} \times Se$

$41.5 \pm 1.96\times 6.1$

$41.5 \pm 11.96$

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3 years ago

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nadezda [96]

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Simplify: (45.22 – 73.91) – |65.85 – 79.15| A. -47.41 B. -41.99 C. 40.18 D. 45.45

Xelga [282]

Are you sure you wrote it right because it should be -42.99

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