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3 years ago

PLEASE HELP I WILL GIVE BRAINLIEST!

Mathematics

2 answers:

salantis [7]3 years ago

5 0

Answer:

3 MIN AND 46 SECONDS. ITHINK BUT DONT QUOTE ME

Step-by-step explanation:

Veseljchak [2.6K]3 years ago

5 0

Answer:

3 minutes 12 seconds

Step by step explanation:

His average speed for the first race was 4.16 m per minute because 525m/126 being the amount of seconds is 4.16. You take this over to the other race and divide 800 by 4.16 to get the amount of seconds which is 192. So she took 3 minutes and 12 seconds to finish the second race.

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True or False

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True the circle is a congruent to the radius of an inscribed regular polygon inside the circle

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3 years ago

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You're a quality control manager in a fruit juice company. You want to choose

alekssr [168]

Answer:

246.

Step-by-step explanation:

a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78

b) The minimum sample size to achieve this is 246.

Step-by-step explanation:

We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of .

So it is z with a pvalue of , so

Now, find the margin of error M as such

In which is the standard deviation of the population(square root of the variance) and n is the size of the sample. So in this question,

The lower end of the interval is the sample mean subtracted by M. So it is 99 - 0.78 = 98.22

The upper end of the interval is the sample mean added to M. So it is 99 + 0.78 = 99.78.

a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78

(b) (5 points) If we want the sampling error to be no greater than 0.5, what is the minimum sample size to achieve this based on the same confidence level with part (a)

We need a sample size of n

n is found when

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Rounding up

The minimum sample size to achieve this is 246.

7 0

3 years ago

Simplify completely****

andreyandreev [35.5K]

Answer:

$\displaystyle \frac{x + 7}{3}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Terms/Coefficients
Factoring

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{x^2 + 12x + 35}{3x + 15}$

Step 2: Simplify

[Fraction] Factor numerator: $\displaystyle \frac{(x + 5)(x + 7)}{3x + 15}$
[Fraction] Factor denominator: $\displaystyle \frac{(x + 5)(x + 7)}{3(x + 5)}$
[Fraction] Divide: $\displaystyle \frac{x + 7}{3}$

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3 years ago

Knowing that sin 30° = 1/2 , what is a?

umka2103 [35]

Answer: D

Step-by-step explanation:

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3 years ago

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Complete the proofs using the most appropriate method. may require CPCTC. *please help*

maria [59]

Answer:

The Proof for

MP ≅ No with Statements and Reasons is below.

Step-by-step explanation:

Given:

MN || PO

MP || NO

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MP≅NO

Proof:

Statements Reasons

1. MN || PO 1. Given.

2.∠NMO ≅ ∠POM 2. Alternate Angles are Equal since MN || PO.

3. MP || NO 3. Given.

4.∠PMO ≅ ∠NOM 4. Alternate Angles are Equal since MP || NO.

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4 years ago