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3 years ago

What are the domain and range of the function x^2-2x^2-4?

Mathematics

1 answer:

jonny [76]3 years ago

7 0

${x}^{2} - 2 {x}^{2} - 4 \\ - {x}^{2} - 4$

The Quadratic Function has the domain as the set of all real numbers.

For the range, start from minimum value to maximum value.

But because the parabola is downward as a < 0. Thus, there are no minimum value but the maximum value instead.

Therefore the range is y <= -4

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You build a fence around garden that measures 10 x 15 feet; how many feet of chain link fence will you need?

Neporo4naja [7]

Answer:

50 feet

Step-by-step explanation:

We have to find the perimeter of the fence surrounding the garden.

2l+2w

2(15) + 2(10)

30 + 20

= 50

50 feet will be needed.

6 0

3 years ago

Read 2 more answers

Find the value of x for the right triangle. trigonometric

damaskus [11]

Here's the solution,

The given triangle is a right angled triangle,

So, by Using Trigonometry :

=》

$\sin(30) = \dfrac{x}{13}$

=》

$\dfrac{1}{2} = \dfrac{x}{13}$

=》

$x = \dfrac{13}{2}$

=》

$x = 6.5$

hence, value of x = 6.5 units

8 0

2 years ago

Two quantities, x and y, are directly proportional. If x is doubled, what happens to y?

vagabundo [1.1K]

Answer:

y is also doubled.

Step-by-step explanation:

Direct proportionality between $x$ and $y$ means that

$y \propto x$

$y=cx$ ,

which indicates a linear relationship between $x$ and $y$ because they are related by a constant.

Therefore, if x is doubled, then the new value of $y$ is $y_{new}$

$y_{new}=c(2x)$

$y_{new}=2(cx)$

$y_{new}=2y$

The new value of $y$ is 2 times the previous; therefore, $y$ is doubled as $x$ is doubled.

7 0

3 years ago

Read 2 more answers

The length of a new rectangular playing field is 4 yards longer than triple the width. if the perimeter of the rectangular playi

jasenka [17]

The length is 4 yards longer than 3width so L = 3W+4
perimeter equal 408 yards

perimeter equal 2L +2W = 2(3W+4)+2W

408 = 6W +8 +2W
400=8W

W = 50

L = 3*50 +4 = 154

L = 154
W = 50

P = 2L +2W
408 = 2*50 +2*154
408 = 100 +308
408 = 408

hope that this is easy understandably

8 0

3 years ago

I don’t understand this at all

xz_007 [3.2K]

Answer:

x=8

Step-by-step explanation:

You would set them equal to each other to get 9x-13=6x+11.

You would them move 6x over so -6x on both sides. This would then get you 3x-13=11.

Then move the -13 over so add 13 to both sides to get 3x=24

Then get x by itself so divide by 3 to get x=24/3.

Then that simplified is 8

8 0

3 years ago