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Svetradugi [14.3K]
3 years ago
13

PLS HELP ASAP FOR BRAINLIEST

Mathematics
1 answer:
rodikova [14]3 years ago
3 0

Answer:

y=3

Step-by-step explanation:

it is because X=-2 had crossed the point y=3

hope this help you!!!! ;))))))

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What is vertex on a graph
dusya [7]
The vertex is the highest point on a downward-opening parabola or the lowest point on an upward-opening parabola. 

6 0
3 years ago
HEEELP
Drupady [299]

Answer: (c)

Step-by-step explanation:

Given

f(x)=\dfrac{1}{x-3}\\\\g(x)=\sqrt{x+5}

Here, \sqrt{x+5}\ \text{is always greater than equal to 0}\\\Rightarrow x+5\geq 0\\\Rightarrow x\geq -5\quad \ldots(i)

To get f\left(g(x)\right), replace x in f(x) by g(x)\ \text{i.e. by}\ \sqrt{x+5}

\Rightarrow f\left(g(x)\right)=\dfrac{1}{\sqrt{x+5}-3}\\\\\text{Denominator must not be equal to 0}\\\\\therefore \sqrt{x+5}-3\neq0\\\Rightarrow \sqrt{x+5}\neq 3\\\Rightarrow x+5\neq 9\\\Rightarrow x\neq 4\quad \ldots(ii)

Using (i) and (ii)  it can be concluded that the domain of f\left(g(x)\right) is all real numbers except 0.

Therefore, its domain is given by

x\in [-5,4)\cup (4,\infty)

Option (c) is correct.

5 0
3 years ago
Can someone please help me? if you can explain please...
weqwewe [10]
C= pi•diameter. If the dinner plate's diameter is 7 inches, then multiply 7 times pi, 3.14. 7•3.14= 21.98. So, the answer for the first question is B, 22. :) 

For the second question, it is asking for the answer in terms of pi. Since the diameter is 6, divide 6 by 2 to get the radius. (A=pi•radius squared) 6 divided by 2 is 3. Now, square 3. which gives you 9. Since the answer has to be in terms of pi, the answer is B. ;) 
7 0
3 years ago
Read 2 more answers
A serological test is being devised to detect a hypothetical chronic disease. 500 individuals were referred to a laboratory for
andriy [413]

Answer: the predictive value positive of the test is 0.7

Step-by-step explanation:

Given that;

                                              Predicted

                                             Diesease                No-Diesease                Tt

Actual              Diesease           225                           75                         300

No-Diesease         25                175                            200

                                                  250                           250                       500

so finding the predictive value positive of the test,

predictive negative value = (175 / (75+175) )

= 175 / 250

= 0.7

Therefore the predictive value positive of the test is 0.7

7 0
3 years ago
Barry made the model to show multiplying a fraction by a fraction. Which multiplication sentence does the model show? A grid wit
barxatty [35]

Given:

Number of rows = 3

Number of columns = 6

Number of square boxes = 18

yellow square boxes in the top two rows = 12

Blue square boxes in the first 5 columns = 15

Number of green boxes (shading overlaps) = 10

To find:

The model to show multiplying a fraction by a fraction.

Solution:

2 rows out of 3 are shaded yellow.

Fraction for yellow = \dfrac{2}{3}

5 columns out of 6 are shaded blue.

Faction for blue = \dfrac{5}{6}

10 out of 18 squares are green.

Faction for green =  \dfrac{10}{18}=\dfrac{5}{9}

Now,

\dfrac{2}{3}\times \dfrac{5}{6}=\dfrac{10}{18}

\dfrac{2}{3}\times \dfrac{5}{6}=\dfrac{5}{9}

Therefore, the correct option is D.

5 0
3 years ago
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