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Naily [24]
3 years ago
8

Can someone PLS solve this mystery story.

Mathematics
1 answer:
nata0808 [166]3 years ago
3 0

Answer:

ill start figuring it out now luv <3

Step-by-step explanation:

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In a classroom of 33 students, the ratio of boys to girls is 3 : 8.
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Answer:

the answer is 9 :)

Step-by-step explanation:

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Find A when p= 2000, r= 7%, n= 4, and t= 4
I am Lyosha [343]

A=prt

A=2000×7%×4

=560

3 0
2 years ago
Monique has 2 less than half as many pairs of shoes as Dalia . Monique has four pairs of shoes. Which equation can be used to fi
viktelen [127]

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4m +2m = D

Step-by-step explanation:

i think i havent done this in a long time but idk

ik that dalia has 6 shoes

4 0
3 years ago
The diameter of a circle endpoints are A(-1, 5) and B(4,-3). Use the midpoint formula to find the coordinates of the center of c
mina [271]

Answer:

centre = (\frac{3}{2}, 1 )

Step-by-step explanation:

using the midpoint formula

midpoint = [\frac{1}{2}(- 1 + 4), \frac{1}{2}(5 - 3) ] = (\frac{3}{2}, 1 )


6 0
3 years ago
A private and a public university are located in the same city. For the private university, 1038 alumni were surveyed and 647 sa
Snezhnost [94]

Answer:

The difference in the sample proportions is not statistically significant at 0.05 significance level.

Step-by-step explanation:

Significance level is missing, it is  α=0.05

Let p(public) be the proportion of alumni of the public university who attended at least one class reunion  

p(private) be the proportion of alumni of the private university who attended at least one class reunion  

Hypotheses are:

H_{0}: p(public) = p(private)

H_{a}: p(public) ≠ p(private)

The formula for the test statistic is given as:

z=\frac{p1-p2}{\sqrt{{p*(1-p)*(\frac{1}{n1} +\frac{1}{n2}) }}} where

  • p1 is the sample proportion of  public university students who attended at least one class reunion  (\frac{808}{1311}=0.616)
  • p2 is the sample proportion of private university students who attended at least one class reunion  (\frac{647}{1038}=0.623)
  • p is the pool proportion of p1 and p2 (\frac{808+647}{1311+1038}=0.619)
  • n1 is the sample size of the alumni from public university (1311)
  • n2 is the sample size of the students from private university (1038)

Then z=\frac{0.616-0.623}{\sqrt{{0.619*0.381*(\frac{1}{1311} +\frac{1}{1038}) }}} =-0.207

Since p-value of the test statistic is 0.836>0.05 we fail to reject the null hypothesis.  

6 0
3 years ago
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