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gregori [183]
3 years ago
5

Help meeee plzzz PLZ

Mathematics
2 answers:
Yuri [45]3 years ago
7 0

Answer:

11 miles

Step-by-step explanation:

Do 8+3 or just count the number of spaces on the number line

MissTica3 years ago
3 0
Answer should be 11 miles cause 8 + 3 = 11 and also 11- 8 =
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How many square feet of outdoor carpet will need for this hole?
adoni [48]

Answer:

4 square feet

Step-by-step explanation:

We can see that the dimensions of the hole in the carpet are 2ft by  2ft. All we have to do is find the area of that shape. Since the two side lengths are the same, and the shape appears to have 4 right angles in each of its corners, we can deduce that the shape is a square. We know that the area of a square can be found by multiplying the length and width measurements of the shape:

2ft * 2ft

= 4 ft²

6 0
3 years ago
Read 2 more answers
35. In a simple random sample of 25 high school students, the sample mean of the SAT scores was 1450, and the sample variance wa
Tatiana [17]

Answer:

1450-2.0\frac{30}{\sqrt{25}}=1450-12    

1450+2.0\frac{30}{\sqrt{25}}=1450+12    

And the best option would be:

c. 1450 +/- 12

Step-by-step explanation:

Information provided

\bar X=1450 represent the sample mean for the SAT scores

\mu population mean (variable of interest)

s^2 = 900 represent the sample variance given

n=25 represent the sample size  

Solution

The confidence interval for the true mean is given by :

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

The sample deviation would be s=\sqrt{900}= 30

The degrees of freedom are given by:

df=n-1=2-25=24

The Confidence is 0.954 or 95.4%, the value of \alpha=0.046 and \alpha/2 =0.023, assuming that we can use the normal distribution in order to find the quantile the critical value would be z_{\alpha/2} \approx 2.0

The confidence interval would be

1450-2.0\frac{30}{\sqrt{25}}=1450-12    

1450+2.0\frac{30}{\sqrt{25}}=1450+12    

And the best option would be:

c. 1450 +/- 12

3 0
3 years ago
SOMEONE HELP ????<br><br> Select steps that could be used to solve the equation 1+ 3x = -x+4
Alex

Answer:

a) add x , subtract 1 and divide by 4

The solution of given equation x = \frac{3}{4}

<u>Step-by-step explanation:</u>

Given equation  1+3 x  = -x +4

                <em>  Add 'x' on both sides , we get</em>

                     1 + 3 x + x = - x + x +4

                     1 + 4 x  = 4

      <em>  Subtract '1' on both sides , we get</em>

<em>                     1+4 x -1 = 4 -1</em>

                         4 x = 3

<em>       Dividing '4' on both sides, we get</em>

                          \frac{4x}{4} = \frac{3}{4}

                          x = \frac{3}{4}

<u><em>Final answer</em></u>:-

<em>The solution of given equation </em>x = \frac{3}{4}<em></em>

5 0
3 years ago
6. For a two-day rental at the surf shop, it costs $45 to rent a surf board and $60 to rent a paddle board. On a
Masja [62]

Answer:

Step-by-step explanation:

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5 0
3 years ago
A car wash cost $7. How many car washes would you be able to purchase for $49. using table
Over [174]
7, 14, 21, 28, 35, 42, 49... 7 cars will need. to be washed to reach $49
4 0
3 years ago
Read 2 more answers
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