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3 years ago

34 + 4 ⋅ 5 = ____. (Input whole numbers only.)

Mathematics

2 answers:

Dimas [21]3 years ago

5 0

Answer:

34+3*5

34+15

49

Hope this helps :)

Step-by-step explanation:

Nady [450]3 years ago

4 0

PEDMAS says that we do the multiplication first
34+3*5
34+15
49 :)

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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)"

7 0

3 years ago

The center of an ice rink is located at (0, 0) on a coordinate system measured in feet. Sandi skates along a path that can be mo

navik [9.2K]

Y = 0.08x2-1.6x+13 and y = 0.08(x-10)2+5 is the correct answer :)

5 0

3 years ago

Read 2 more answers

What integer does the arrow indicate?

Vsevolod [243]

Answer:

-9

Step-by-step explanation:

Given

See attachment for number line

Required

What does the arrow integer

Represent the value of the arrow with x.

The arrow is on number -9.

This number is what the arrow represents.

Hence:

$x = -9$

8 0

3 years ago

What is the following product? (1√2+√6)(√6- √10)

Sidana [21]

To multiply these, we use the FOIL method (first, outside, inside, last). Also, 1√2 is equivalent to √2. It's just like saying 1x is the same x.

Multiplying the first values will give you:

√2 * √6 = √12 = √4*3 = √2*2*3 = 2√3

Multiplying the outside values will give you:

√2 * -√10 = -√20 = -√4*5 = -√2*2*5 = -2√5

Multiplying the inside values will give you:

√6 * √6 = √36 = 6

Multiplying the last values will give you:

√6 * -√10 = -√60 = -√4*15 = -2√15

Now you can combine all of the resulting values:

2√3 - 2√5 - 2√15 + 6

I believe this is the answer you're looking for.

4 0

3 years ago

Read 2 more answers

Use the slope formula to find the slope. y2 -4 y1 2 x2 0 x1 2 m=ΔyΔx=y2−y1x2−x1 Usetheslopeformula m = Δ y Δ x = y 2 - y 1 x 2 -

jenyasd209 [6]

Answer:

The slope is, 3

Step-by-step explanation:

Formula for slope(m) is given by:

$m = \frac{\triangle y}{\triangle x}$