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2 years ago

The number of dogs in a pet store decreased from 35 to 31.

Mathematics

2 answers:

Ray Of Light [21]2 years ago

7 0

The answer is A. 11% when it it rounded to the nearest percent

Dafna1 [17]2 years ago

6 0

A. because 11% is rounded.
Hope that helps :)

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How do I do this activity?

d1i1m1o1n [39]

In the X column put 1, 2, and 3

for the y column, plug in the 1, 2, or 3 into the X

for example, a) y=5x+3

x= 1, 2, 3 y=5(1)+3 = 8

y= 8, 13, 18

7 0

3 years ago

7. Find the perimeter of triangle FGH.

belka [17]

Answer:

9.) Its equilateral

7.) 24

Step-by-step explanation:

Sorry I only have the answer for 7 and 9.

3 0

3 years ago

Factorise <br> 84xy+196x-36y-84

LenaWriter [7]

Hi,

84xy+196x-36y-84

4(21xy+49x-9y-21)

4(7x × (3y+7)-9y-21)

4(7x × (3y+7)-3(3y+7)

4(3y+7)×(7x-3)

4 0

3 years ago

Assume a researcher recruits 150 African American and Caucasian individuals taking warfarin to determine if there is a differenc

Anettt [7]

Answer:

Z=11.0

Step-by-step explanation:

Let Caucasian individuals be the population 1 and African American be the population 2. So, we are given that

n=150

n1=75

mean1=xbar1=6.1.

standard deviation1=S.D1=σ1=1.1.

Variance1=V(x1)=σ1²=1.1²=1.21.

n2=75.

mean2=xbar2=4.3.

standard deviation2=S.D2=σ2=0.9.

Variance2=V(x2)=σ2²=0.9²=0.81.

The z-statistic is

$Z=\frac{xbar1-xbar2}{\sqrt{\frac{V(x1)}{n1}+ \frac{V(x2)}{n2} } }$

$Z=\frac{6.1-4.3}{\sqrt{\frac{1.21}{75}+ \frac{0.81}{75} } }$

$Z=\frac{1.8}{\sqrt{0.0161+ 0.0108 } }$

$Z=\frac{1.8}{\sqrt{0.0269 } }$

$Z=\frac{1.8}{0.164 } }$

Z=10.97

Z=11.0

So, the z value obtained while calculating the test statistic is approximately 11.0.

4 0

3 years ago

Please I need the answer for this question

nika2105 [10]

Answer:

I think this is the answer.

Step-by-step explanation:

I think it is C. but I am unsure, because I think it might also be able to be B.. Uh! I am so confused, but C. is my best guess.

3 0

3 years ago