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Afina-wow [57]
3 years ago
15

Plzzzz help !!!! I need this done

Mathematics
1 answer:
STatiana [176]3 years ago
3 0

Answer:

A) x + 2 ≤ 3

Step-by-step explanation:

To solve for this, you subtract 2 from both sides leaving you with:

x ≤ 1

which is what the graph is showing.

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You are part of a rowing team. Every 1, miles you stop to take a drink of water. How many times will you stop to drink water if
musickatia [10]

Answer:

10 stops I think as the 0.2 is not a full mile so you dont stop

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Grades on a standardized test are known to have a mean of 1000 for students in the United States. The test is administered to 45
krok68 [10]

Answer:

a

The 95% confidence interval is 1003  <  \mu

b

Yes there is statistically significant evidence that students in Florida perform differently from other students in the United States

Step-by-step explanation:

From the question we are told that

   The population mean is  \mu =  1000

   The sample size is  n =  453

   The sample mean is  \= x  = 1013

    The standard deviation is s =  108

   

Given that the confidence level is  95% then the level of significance is mathematically represented as

            \alpha  =  100 - 95

=>         \alpha  =  5\%

=>          \alpha  = 0.05

The critical value  for \frac{\alpha }{2} obtained from the normal distribution table is          

          Z_{\frac{\alpha }{2} } =  1.96

Generally the margin of error is mathematically represented as

         E =  Z_{\frac{\alpha }{2} } *  \frac{s}{\sqrt{n} }

=>     E =  1.96 *  \frac{108}{\sqrt{453} }

=>      E = 9.946

Generally the 95% confidence interval is mathematically represented as

           \= x  - E  <  \mu <  \= x + E

=>         1013  - 9.946  <  \mu < 1013  + 9.946

=>         1003  <  \mu

Given that the population mean(1000) is not within the 95% confidence interval for l for the average test score for students in Florida, then it means that there is statistically significant evidence that students in Florida perform differently from other students in the United States

 

4 0
3 years ago
Write the quadratic function in vertex form. y=-3x^2+24x-50
castortr0y [4]

Answer:

Step-by-step explanation:

y = -3x² + 24x - 50

factor out leading coefficient

y = -3(x² - 8x) - 50

complete the square

 coefficient of the x term: -8

 divide it in half: -4

 square it: (-4)² = 4²

 use 4² to complete the square and keep the equation balanced:

y = -3(x² - 8x + 4²) + 3(4²) - 50

y = -3(x-4)² - 2

4 0
3 years ago
ILL MARK BRAINLIEST
Korolek [52]

Answer:

0.70

0.31

1.18

Step-by-step explanation:

0.70

0.31

1.18

6 0
2 years ago
If the ratio of a to b is 2.3 and the ratio
viva [34]

Answer:5.7 D

Step-by-step explanation:

4 0
3 years ago
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