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likoan [24]
2 years ago
7

Can anyone answer this for me?

Mathematics
1 answer:
Sunny_sXe [5.5K]2 years ago
8 0

Answer:

y = 2 - x^{2}

Step-by-step explanation:

x^{2} results in a parabola (U-shape). Adding a negative in front of it flips the parabola to look like an upside-down U.

The 2 makes it shift up two decimal spots to (0,2).

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Studies have suggusted that twins, in their early years, tend to have lower IQs and pick up language more slowly than non-twins.
Anna007 [38]

Answer:

Confidence interval: (21.9, 32.9).

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 26 - 1 = 25

98% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 25 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.98}{2} = 0.99. So we have T = 2.485

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.485\frac{11.2}{\sqrt{26}} = 5.5

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 27.4 - 5.5 = 21.9 hours

The upper end of the interval is the sample mean added to M. So it is 27.4 + 5.5 = 32.9 hours

Confidence interval: (21.9, 32.9).

5 0
3 years ago
PLEASE HELP!!! Pr-Cal Question 20 points
Brilliant_brown [7]

Answer:

3600

Step-by-step explanation:

perimeter is  120ft

Goal is to get the largest area.

so you can start with a list of possible solutions:

1*119 = 119ft

2*118 = 236ft

.

.

.


60*60 =3600ft

61*59 = 3599ft

.

.


7 0
3 years ago
Read 2 more answers
Please help me I’m desperate and in need of hep‼️‼️‼️ Describe how to calculate the volume of a composite 3-D figure.
Ugo [173]

Answer:

To find the volume of a composite 3D figure, draw any necessary planes to view the figure as basic three dimensional figures, then:

add basic figure volumes belonging to the composite shape.

subtract basic figure volumes NOT belonging to the composite figure.

Step-by-step explanation:

5 0
2 years ago
Which is the best prediction for the number of pages in a chapter that takes 18 minutes to read?
mario62 [17]

Answer with explanation:

Time taken by a person to read number of pages in a chapter= 18 minutes

It is not given what is the length of the page.So,we can't say exactly  how many pages can a person read by completely understading what is written in each page in a chapter.

So, to fully understand each and every page in 18 minutes you can read minimum number of pages from the option given.

Option A:⇒ 15, is most appropriate.

9 0
3 years ago
Read 2 more answers
Solve for x: 4.23x + 1 = 17.8929 A. 0 B. 14.6629 C. 5.23 D. 6.23 PLEASE HELP!!!
maksim [4K]

Answer:

d

Step-by-step explanation:

6 0
3 years ago
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