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Oksana_A [137]
3 years ago
14

Help plz help plz help plz help plz find value of b​

Mathematics
2 answers:
STALIN [3.7K]3 years ago
7 0
X=18 for the simplest answer
brainliest?
zimovet [89]3 years ago
4 0

Answer:

9. x = 16

10. x = 18

Step-by-step explanation:

9. 2x + 9 + 3x + 1 = 90

5x + 10 = 90

5x + 80

x = 16

10. 90 - 53 = 47

2x + 11 = 47

2x = 36

x = 18

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Express the confidence interval
marissa [1.9K]

Answer:

\hat p = \frac{0.244+0.326}{2}=0.285

ME = \frac{0.326-0.244}{2}=0.041

0.285 \pm 0.041

Step-by-step explanation:

For this case we have a confidence interval given as a percent:

24.4\% \leq p \leq 32.6\%

If we express this in terms of fraction we have this:

0.244 \leq p \leq 0.326

We know that the confidence interval for the true proportion is given by:

\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

And thats equivalent to:

\hat p \pm ME

We can estimate the estimated proportion like this:

\hat p = \frac{0.244+0.326}{2}=0.285

And the margin of error can be estimaed using the fact that the confidence interval is symmetrical

ME = \frac{0.326-0.244}{2}=0.041

And then the confidence interval in the form desired is:

0.285 \pm 0.041

7 0
3 years ago
Which is greater -5 or -7
Natasha_Volkova [10]
-5 I believe so idk...
5 0
3 years ago
Read 2 more answers
ANSWER NOW PRONTO STACKED PLSSSSSS 20 POINTS
skad [1K]

Answer:

6.7 I think

Step-by-step explanation:

hope this helps

6 0
3 years ago
Suppose a pizza must fit into a box with a base that is 12 inches wide.
mojhsa [17]
The area of the whole pizza must be at most 113.10 square inches in order to perfectly fit in the box. The values of r represent the half of the length of the pizza with respect to its center. In this case, the r must not exceed 6 inches (r ≤ 6 inches) in order to fit in the pizza box. On the other hand, the values of a represent the total area the pizza will occupy. In this case, the a must not exceed 113.10 square inches (a <span>≤ 113.10) </span>in order to house the pizza perfectly. 
4 0
3 years ago
Write a 3-digit number that is divisible by both 3 and 4. Explain how you know this number is divisible by 3 and 4.
Alexeev081 [22]

Answer:

let us assume the 3 digit number be 984

To check weather the number is divisible by 3 and 4 then when should know the divisibility rule of 3 and 4.

A number is said to be divisible by 3 when the sum of each digit of the number is divisible by 3. Example 9+8+4 = 21 is divisible by 3 hence the number is divisible by 3.

A number is said to be divisible by 4 when the last two digit is divisible by 4 like 84 is divisible by 4 hence 984 is divisible by 4.

5 0
3 years ago
Read 2 more answers
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