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3 years ago

Which one is it is it a b c or d

Mathematics

2 answers:

Novay_Z [31]3 years ago

5 0

The answer is D. B has the number 3 has the first numbers so that’s not it. C has the number 4 has the first numbers so thats not it. D is the only one that have different numbers in first numbers in the order (5, 8, 9)

Leviafan [203]3 years ago

5 0

Answer:

Step-by-step explanation:

the x (first number in the ordered pair) cant match with another x

in every other line, the x repeats which makes the function thing make a diagonal line instead. **khan academy explains it well btw**

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The distance around a meteor crater is 9,033ft. Find the diameter of the crater. Use 22/7 for pi. Round to the nearest tenth

Aleonysh [2.5K]

<span>We know that the circumference of a circle is equal to pi times the diameter of the circle. Therefore, assuming this crater to be circular in shape, we can divide the circumference by pi, in this case 9033*7/22, yielding an answer of 2874.1 feet after rounding.</span>

3 0

3 years ago

16r^4t-6r^3t^2+4rt^2=

DochEvi [55]

Answer:

$2rt(8r^3-3r^2t+2t)$

Step-by-step explanation:

We have been given a polynomial $16r^4t-6r^3t^2+4rt^2$ and we are supposed to simplify our polynomial.

We will use factoring to simplify our polynomial. Let us factor out the greatest common factor of all the terms.

We can see that 16, 6 and 4 has 2 as their greatest common factor.

The greatest common factor of $r^4, r^3,r$ is r.

The greatest common factor of $t, t^2, t^2$ is t.

So the greatest common factor of the terms of our expression will be $2rt$ .

Let us factor out $2rt$ from our given polynomial.

$2rt(8r^3-3r^2t+2t)$

As we can not factor our expression more, therefore, we will get $2rt(8r^3-3r^2t+2t)$ after simplifying our polynomial.

5 0

3 years ago

A sample of 173 students using Method 1 produces a testing average of 88. A sample of 127 students using Method 2 produces a tes

Lerok [7]

Answer:

43 < μ₁ - μ₂ < 49

Step-by-step explanation:

Sample 1:

Mean x₁ = 88

Sample size n₁ = 173

Sample standard deviation s₁ = 12,22

Sample 2:

Mean x₂ = 53,5

Sample size n₂ = 127

Sample standard deviation s₂ = 13,59

CI 95 % α = 5% α = 0,05 α/2 = 0,025

We need to find:

( x₁ - x₂ ) - tα/2,v *√ (s₁²/n₁ ) + (s₂²/n₂) < μ₁ - μ₂ < ( x₁ - x₂ ) + tα/2,v *√ (s₁²/n₁ ) + (s₂²/n₂)

v = degree of fredom

v = [ ( s₁²/n₁ + s₂²/n₂)² / (s₁²/n₁)² /n₁-1 + (s₂²/n₂)²/n₂-1

v = [ (0,86 + 1,45 ) / 0,0043 + 0,017

v = 2,31 / 0,0213

v = 108

Then t 0,025, 108 from t table is: We will take v = 100

t = 1,984

Now

√ (s₁²/n₁ ) + (s₂²/n₂) = √ 0,86 + 1,43

√ 2,3 = 1,51

Then: CI:

(173 - 127 ) - 1,984*1,51 < μ₁ - μ₂ < ( 173 - 127 ) + 1,984*1,51

46 - 3 < μ₁ - μ₂ < 46 + 3

43 < μ₁ - μ₂ < 49

8 0

3 years ago

Which sequence is modeled by the graph below? coordinate plane showing the points 1, 2; 2, 4; 3, 8

irakobra [83]

A..........a..........a

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3 years ago

Why are online payment services necessary?

denis23 [38]

In this digital age, online payment services are added services that will make bill payments easier.

Online stores and businesses have cropped up and their market is worldwide. To facilitate easy exchange of goods and services, online payment services are offered.

Online payment services benefit both the seller and the buyer. They buyer no longer need to go to a physical office to deposit his payment, all he has to do is lodge his debit or credit card to pay his bills or online purchases. Sellers also benefit from these services because he'll know that his buyers are not bogus and online payments are real-time transactions. Thus, making payment tracking easier for documentation purposes.

4 0

3 years ago

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