3 years ago

Find the key features for m [x]=3x^2+13x-30

Mathematics

1 answer:

ludmilkaskok [199]3 years ago

8 0

Answer:

x1= -6 and x2= 5/3

Step-by-step explanation:

good luck

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Cerrena [4.2K]

Answer:

x = 6

Step-by-step explanation:

Alternate angles are congruent.

7x - 9 = 3x + 15 {Subtract 3x form both sides}

7x - 3x -9 = 15

4x - 9=15 {Add 9 to both sides}

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3 years ago

SCORPION-xisa [38]

Answer:

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Step-by-step explanation:

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2 years ago

Farrah borrowed $155 from her brother. She has already paid back $15. She plans to pay back $35 each month until the debt is pai

Sergeeva-Olga [200]

Answer:

4 months

Step-by-step explanation:

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3 years ago

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the reporter asked 12 people in the company why they liked working for their boss and found 8 people of the said it was beacuse

spin [16.1K]

Whats your question?

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3 years ago

Small sample: During an economic downturn, companies were sampled and asked whether they were planning to increase their workfor

leva [86]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The confidence level interval is $0.016 \le C \le 0.404$

Step-by-step explanation:

The sample size is $n = 20$

The number planning to increase workforce is $x = 3$

The confidence level is $c = 98$ %

The value of proportion for a plus 4 method is

$p = \frac{x+2}{n+4}$

substituting values

$p = \frac{3+2}{20+4}$

$p =0.21$

The z-critical value at confidence level of 98% is

$z_{c}=z_{0.98} = 2.33$

This values is obtained from the standard normal table

The confidence level interval can be mathematically represented as

$C =p \ \pm z_{c} * \sqrt{\frac{p(1-p)}{n+4} }$

substituting values

$C = 0.21 \pm 2.33 * \sqrt{\frac{0.21(1- 0.21)}{20 +4} }$

$C = 0.21 \pm 0.194$

=> $0.016 \le C \le 0.404$

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3 years ago