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3 years ago

Find the midpoint of segment EF if E (5,-2) F(1,-8) URGENT

Mathematics

1 answer:

Elina [12.6K]3 years ago

4 0

Answer

(3, -5)

Step-by-step explanation:

hope it helps :)

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Plz help ASAP 8(5 – n) = 2n

marin [14]

Answer:

n=4

Step-by-step explanation:

Distribute the 8. and then subtract 8n from both sides and divide 40 and 10n.

7 0

3 years ago

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Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant. Fifty offspring are produced

Butoxors [25]

Answer:

1) $\chi^2 = \frac{(30-25)^2}{25} +\frac{(20-25)^2}{25} =1 +1 =2$

2) $df = c-1 = 2-1$

Where c represent the number of categories c=2

Step-by-step explanation:

Previous concepts

A chi-square goodness of fit test "determines if a sample data matches a population".

A chi-square test for independence "compares two variables in a contingency table to see if they are related. In a more general sense, it tests to see whether distributions of categorical variables differ from each another".

Assume the following dataset:

Tall =30 , Short =20

We need to conduct a chi square test in order to check the following hypothesis:

H0: The deviations from a 1:1 ratio (25 tall and 25 short) are due to chance.

H1: The deviations from a 1:1 ratio (25 tall and 25 short) are NOT due to chance.

Part 1

So then we know that the expected values would be 25 for each case

The statistic to check the hypothesis is given by:

$\sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}$

And if we replace we got:

$\chi^2 = \frac{(30-25)^2}{25} +\frac{(20-25)^2}{25} =1 +1 =2$

Part 2

For this case the degreed of freedom are given by:

$df = c-1 = 2-1$

Where c represent the number of categories c=2

And we can calculate the p value given by:

$p_v = P(\chi^2_{1} >2)=0.157$

And we can find the p value using the following excel code:

"=1-CHISQ.DIST(2,1,TRUE)"

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4 years ago

Evaluate -2x + -3y if x = 10 and y = -6

emmasim [6.3K]

-2(10)+-3(-6)

It would be -2

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3 years ago

Write three fractions that are equivalent to 3 over 11 , but written in higher terms. One of them must

Alinara [238K]

Answer:

Three fractions that are equivalent to $\frac{3}{11}$ are: $\frac{6}{22}$ , $\frac{24}{88}$ and $\frac{144}{528}$ .

Step-by-step explanation:

Equivalent fractions are set of fractions in which when simplified, they have the same answer.

Given: $\frac{3}{11}$

i. multiply the numerator and denominator of $\frac{3}{11}$ by 2,

= $\frac{3*2}{11*2}$ = $\frac{6}{22}$

i. multiply both the numerator and denominator of $\frac{6}{22}$ by 4,

= $\frac{6*4}{22*4}$ = $\frac{24}{88}$

ii. multiply the numerator and denominator of $\frac{24}{88}$ by 6,

= $\frac{24*6}{88*6}$ = $\frac{144}{528}$

So that;

$\frac{3}{11}$ = $\frac{6}{22}$ = $\frac{24}{88}$ = $\frac{144}{528}$ .

Three fractions that are equivalent to $\frac{3}{11}$ are: $\frac{6}{22}$ , $\frac{24}{88}$ and $\frac{144}{528}$ .

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4 years ago

Find the surface area of a cone with a radius of 4cm and a slant height of 7cm. Assume π has a value of 3.14

svetoff [14.1K]

Answer:

138.23cm^2

Step-by-step explanation:

I took an assessment with the same question

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3 years ago

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