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3 years ago

NEED HELP NOW 100 POINTS WILL MARK BRAINLIEST PLZ ANSWER ALL 5 PHOTOS BELOW!!!!!!

Mathematics

2 answers:

joja [24]3 years ago

7 0

39=a 40=c 41=a 42=b 43=a 44=d 45=c 46=a 47=d. I hope this helped!

Galina-37 [17]3 years ago

3 0

39=a 40=c 41=a 42=b 43=a 44=d 45=c 46=a 47=d. I hope this helped!

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Which theorem is correct

kogti [31]

Answer:

The SSS theorem

Step-by-step explanation:

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3 years ago

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Danielle estimates that she will spend $250 on new summer clothes. She actually spent $350. What is the percent error? Round to

lesya [120]

Answer:

%28.57 (14285714286)

Step-by-step explanation:

Divid To get decimal (percent right)

250/350= 0.714285714285714

Subtract from 1 to get decimal (Percent wrong)

1.0 - 0.714285714285714= 0.285714285714286

Move over decimal to placements to the right to convert to percent

%28.5714285714286

Round

%28.57

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3 years ago

Which of the following numbers are less than -0.625

Svetllana [295]

Answer:

Step-by-step explanation:

A -8/5 = -1.6 which is less than 0.625 because 0.625 is closer to zero

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3 years ago

Roll the number cube to find the observed frequency. Which statements are true? Check all that apply

ch4aika [34]

Answer:

(a) and (c)

Step-by-step explanation:

Given

See attachment for complete question

Required

Select all true statements

First, calculate the total observed frequency;

$Total = 11 + 16 + 14 + 20 + 12 + 17$

$Total = 90$

(a): Relative frequency of 4 is 2/9

Relative frequency is calculated by:

$RF= \frac{Observed\ Frequency}{Total}$

For roll 4

$Observed\ frequency = 20$

So, the relative frequency is:

$RF = \frac{20}{90}$

Simplify

$RF = \frac{2}{9}$

(a) is true

(b): Experimental probability of 3 greater than its theoretical probability

The experimental probability is its relative frequency;

For roll 3

$Observed\ frequency = 14$

The experimental probability is:

$Pr = \frac{14}{90}$

Simplify

$Pr = \frac{7}{45} = 0.156$

To calculate the theoretical probability, w have:

$S = \{1,2,3,4,5,6\}$ ---- sample space

$n(S)= 6$

$n(3) = 1$ --- number of times 3 occur

The theoretical probability is:

$Pr = \frac{1}{6} = 0.167$

The theoretical probability is $greater\ than\ the$ experimental probability.

(b) is false

(c): Experimental probability of 2 greater than its theoretical probability

Using the explanations in (b), we have:

For roll 2

$Observed\ frequency = 16$

The experimental probability is:

$Pr = \frac{16}{90}$

Simplify

$Pr = \frac{8}{45} = 0.178$

To calculate the theoretical probability, we have:

$n(S)= 6$

$n(2) = 1$

The theoretical probability is:

$Pr = \frac{1}{6} = 0.167$

The experimental probability is $greater\ than\ the$ theoretical probability.

(c) is true

(d): Relative frequency of 5 is 2/13

For roll 5

$Observed\ frequency = 12$

The relative frequency is:

$RF = \frac{12}{90}$

Simplify

$RF = \frac{2}{15}$

(d) is true

7 0

3 years ago

College alcohol and drug use: In a Washington Post/Kaiser Family Foundation poll conducted from January through March 2015, 56%

jolli1 [7]

Answer:

d. We are 95% confident that the proportion of adults (ages 17-26) who attended college is between 53% and 59%.

Step-by-step explanation:

Confidence interval of a proportion p.

We build a confidence interval at the x% level from a sample.

With this, we can say that we are x% sure that the true population propotion is in the interval.

The 95% confidence interval is (0.53, 0.59).

This means that we are 95% sure that the true population proportion is between 0.53 and 0.59.

So the correct answer is:

d. We are 95% confident that the proportion of adults (ages 17-26) who attended college is between 53% and 59%.

7 0

3 years ago