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4 years ago

7

Help me please I don’t understand!!!

2 answers:

Ganezh [65]4 years ago

7 0

Answer:

-1

Step-by-step explanation:

There are things called domain and range.

Domain is all the x values and range is all the y values.

Since in your picture the parabola only seems to be touching -1, that is your domain.

Kitty [74]4 years ago

3 0

Answer:

The domain is all real numbers.

Step-by-step explanation:

Imagine the arrows extending forever. There is nothing to the left or right to stop them from growing infinitely far apart, and <u>including all numbers</u> in between! The domain is vast!

It may help to think of range like a mountain range with peaks and valleys. A parabola's vertex might be the peak of a mountain or the low spot in the valley.

In the graph shown here, the vertex is at (-1,0) The range can't go any higher. But the arrows point forever to negative infinity. So if the question asked about the range, it would be all numbers less than or equal to 0.

I hope this helps you understand better!

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Solve the equation 5n+7=21

Simora [160]

Answer:

Hi there, I believe the answer to this equation is: 2.8

Step-by-step explanation:

Subtract 7 on both sides so

5n+7=21-7

you are left with 5n=14 you need to get n by itself so divide 5 on both sides.

5n/5 = 14/5

n=2.8

Hope this is correct :)

Have a great day

5 0

3 years ago

Read 2 more answers

The function f(x)=-(x-3)^2 +9 can be used to represent the area of a rectangle with the perimeter of 12 units, as a function of

Ivenika [448]

Maximum area of the rectangle is $9cm^{2}$

<u>Explanation:</u>

<u></u>

Considering the dimensions to be in cm

$f(x) = -(x-3)^{2} +9\\f(x) = -(x^{2} +9 - 6x)+9\\f(x) = -x^{2} +6x\\f'(x) = -2x+6\\-2x+6 = 0\\2x=6\\x=3cm\\\\$

Putting the value of x = 3

$Perimeter = 2(x+b)\\12 = 2(3+b)\\6 = 3+b\\b= 3cm$

$Area of rectangle = x X b\\ = 3 X 3\\ = 9cm^{2}$

Therefore, maximum area of the rectangle is $9cm^{2}$

7 0

3 years ago

Solve x2 - 4x + 1 = 0.<br> x = 2+ 21-25<br> X = 4+<br> X = 2+ 3<br> x = -2+

adelina 88 [10]

I think the answer is this
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Combine like terms
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3 years ago

A survey of sports fans reveals that 49 say their favorite sport is football, 35 say their favorite sport is baseball, 11 say th

pogonyaev

Answer:

9.80

Step-by-step explanation:

Given that a survey of sports fan was conducted counting no of persons whose favourite was football, baseball, basketball and hockey.

Given that 49 like football, 35 baseball, 11 basket ball and 5 hockey

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We find that hockey fans are 5 and football fans are 49

Ratio of football fans to hockey fans =49/5

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daser333 [38]

Answer:

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Step-by-step explanation:

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