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astraxan [27]
3 years ago
13

Me ajuda ai ....10x-1=2x^2+7

Mathematics
1 answer:
garik1379 [7]3 years ago
3 0

Answer:

x = 1 and/or x = 4

Step-by-step explanation:

You can solve by factoring, using the quadratic formula, or completing the square.

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Categorize these samples as representative or not representative of the given populations.
yuradex [85]
<u>Representatives: This means that a certain amount of people would constitute what the majority would think too.

</u>1) Tina interviews the school's soccer team about the exercise habits of  the students at her school. (implying all the students). This means that Tina only goes to the soccer team instead of the whole school to find out the whole school's exercise habit.
<u></u>2) Alana also counts as representatives, because she did not interview ALL of the teachers, rather just a selected majority (in this case)
5) For Jeremy, he only interviews 5 students from each class rather than all students<u>
Not Representatives: Each person is given a choice of opinion and does not affect other people.
</u>3) Joe talks to fathers of high school students, which could be larger than just 'representatives', and implies a larger group of people, and is not as selective as having representatives
<u />4) Social Media constitutes of a large group of people, generally larger than a school, and if people take time to take the survey, it will generate a larger test-group. Also, everybody answering the survey would take time to think about themselves, and only represent themselves, and not others.


hope this helps
5 0
4 years ago
A cone has a diameter of 3 inches. The cone holds 12 cubic inches of water.
dmitriy555 [2]

Answer:

The  height of the cone is 5.09 inches

Step-by-step explanation:

Given:

The volume of the cone  =  12 cubic inches

The diameter of the cone  = 3 inches

To Find :

The height of the cone  =  ?

Solution:

We know that the volume of the cone is

Volume  = \pi r^2\frac{h}{3}

where

r is the radius of the cone

h is the  height of the cone

Now substituting the given values

12 = \pi (1.5)^2  \frac{ h }{3}

\frac{12}{\pi 2.25}  = \frac{h}{3}

h = \frac{12}{ 2.25 \pi} \times 3

h = \frac{ 12}{7.065} \times 3

h = 1.698 \times 3

h =  5.09  inches

6 0
3 years ago
x is a point in the interior of rectangle PTRS. If XP=a, XT=c and XR=b, determine XS. a&lt;b&lt;c.  Answer should be in terms of
White raven [17]
So you cannot really get the exact measure because they didn't give you any measures, but we can infer that if c>b and a then
maybe SX (d) is more than b and a so

a<b<c or d not sure which
sorry if I didn't help
3 0
3 years ago
Define precision.
lesya [120]
I believe the answer is C: how close a measurement comes to the expected value
6 0
3 years ago
Read 2 more answers
Will give brainliest please help ASAP
Eva8 [605]

Answer:


Step-by-step explanation:

It is (3,-1).

3 0
3 years ago
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