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AlexFokin [52]
3 years ago
8

Which of the expressions are equivalent to the one below? (4x1)-6

Mathematics
2 answers:
vovangra [49]3 years ago
5 0
C because you can switch any of the numbers as long as they are in the parentheses
victus00 [196]3 years ago
3 0
C because they just switched the 4 and the 1 and changed the x to a . Which is still equivalent to multiplication
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What value of x makes the function {(1,5), (x,8), (-7,9)} a function?
mestny [16]
X can be anything you want as long as it is not 1 or -7. If you have repeated x values with different y values, then it won't be a function. 
5 0
4 years ago
12. A research study was conducted to estimate the number of white perch (a type of fish) in a Midwestern lake. 300 perch were c
Artyom0805 [142]

Answer:

If the scientist’s estimate about the number of fish in the lake is correct, then it is 44% likely to get 20 perch out of 50 with a tag.

Step-by-step explanation:

Let p be the proportion of tagged white perch in the Midwestern lake.

Scientist's claim is that p=\frac{300}{1000} =0.30

Let's test this hypothesis as:

  • H_{0}: p=0.30
  • H_{a}: p≠0.30

P-value of the test statistic will give the likelihood of getting 20 perch out of 50 with a tag if the scientist's estimate (H_{0}) is true.

Test statistic can be calculated using the equation

z=\frac{p(s)-p}{\sqrt{\frac{p*(1-p)}{N} } } where

  • p(s) is the sample proportion of white perch  (\frac{20}{50} =0.25)
  • p is the proportion assumed under null hypothesis. (0.30)
  • N is the sample size (50)

Then z=\frac{0.25-0.30}{\sqrt{\frac{0.30*0.70}{50} } }≈ -0.77

Two tailed p-value of the test statistic is ≈ 0.44

Thus if the scientist’s estimate about the number of fish in the lake is correct, (p=0.30) then it is 44% likely to get 20 perch out of 50 with a tag.

4 0
4 years ago
How much do you need to divide to get 56
cluponka [151]

Answer:

560/10 WILL EQUAL TO 56

Step-by-step explanation:

7 0
4 years ago
A person takes up 24 inches of space on a stadium bleacher. If one row of bleachers is 150 feet long and there are 20 rows of bl
Feliz [49]

Answer:

1,500 people

Step-by-step explanation:

Remember that

1\ ft= 12\ in

Convert ft to in

150\ ft=150*12=1,800\ in

<em>Divide the length of a row by the space occupied by one person</em>

1,800/24=75\ persons

<em>Multiply by the number of rows to determine the total people that can fit into the stands</em>

75(20)=1,500\ people

3 0
3 years ago
Write the equation of the parabola in vertex form<br><br> vertex (1,2), point (2,-3)
Andrew [12]

Answer:

Step-by-step explanation:

Find the parabola through  ( 2 , − 3 )  with vertex  ( 1 , 2 ) .

Standard Form:  y = 5 x ² − 20 x + 17

Vertex Form:  y = 5 ( x − 2 ) ²− 3

Download docx
4 0
3 years ago
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