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NeTakaya
3 years ago
14

Hey could someone help?

Mathematics
2 answers:
torisob [31]3 years ago
6 0

Answer:

It might be the second one!

Step-by-step explanation:

katen-ka-za [31]3 years ago
5 0
I believe it’s the 2nd one
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Solve for x.<br><br> −32&gt;−5+9x<br><br><br><br> Enter your answer, as an inequality, in the box.
Elan Coil [88]
+5 to both sides
9x<-27
divide both sides by 9
x<-3

4 0
3 years ago
Find the value of x. Round your answer to the nearest tenth.
NikAS [45]

Answer:

In this question, we can use the Pythagorean theorem to solve for x.

11^2 + x^2 =24^2

x^2 = 24^2 -11^2

x is about 21.3

Let me know if this helps!

8 0
2 years ago
What is 2.89 rounded to the nearest whole number
GuDViN [60]

Answer:

3

Step-by-step explanation:

The tenths is the closest to the ones places.There is more than 4 so we can add 1 to the whole number and take off the extras,and there you have it!

4 0
3 years ago
Read 2 more answers
In a survey, 11 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped
pickupchik [31]

Answer:

The population standard deviation is not known.

90% Confidence interval by T₁₀-distribution: (38.3, 53.7).

Step-by-step explanation:

The "standard deviation" of $14 comes from a survey. In other words, the true population standard deviation is not known, and the $14 here is an estimate. Thus, find the confidence interval with the Student t-distribution. The sample size is 11. The degree of freedom is thus 11 - 1 = 10.

Start by finding 1/2 the width of this confidence interval. The confidence level of this interval is 90%. In other words, the area under the bell curve within this interval is 0.90. However, this curve is symmetric. As a result,

  • The area to the left of the lower end of the interval shall be 1/2 \cdot (1 - 0.90)= 0.05.
  • The area to the left of the upper end of the interval shall be 0.05 + 0.90 = 0.95.

Look up the t-score of the upper end on an inverse t-table. Focus on the entry with

  • a degree of freedom of 10, and
  • a cumulative probability of 0.95.

t \approx 1.812.

This value can also be found with technology.

The formula for 1/2 the width of a confidence interval where standard deviation is unknown (only an estimate) is:

\displaystyle t \cdot \frac{s_{n-1}}{\sqrt{n}},

where

  • t is the t-score at the upper end of the interval,
  • s_{n-1} is the unbiased estimate for the standard deviation, and
  • n is the sample size.

For this confidence interval:

  • t \approx 1.812,
  • s_{n-1} = 14, and
  • n = 11.

Hence the width of the 90% confidence interval is

\displaystyle 1.812 \times \frac{14}{\sqrt{10}} \approx 7.65.

The confidence interval is centered at the unbiased estimate of the population mean. The 90% confidence interval will be approximately:

(38.3, 53.7).

5 0
3 years ago
Can someone help me with this question pls and thank you
konstantin123 [22]

Answer:

x>2

Step-by-step explanation:

Longer than two hours is >.

3 0
2 years ago
Read 2 more answers
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