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natali 33 [55]
3 years ago
8

Dana is attaching a shelf to a wall and needs the shelf to be perpendicular to the wall. How many degrees should the shelf be re

lative to the wall?
Mathematics
2 answers:
KiRa [710]3 years ago
8 0
90° because perpendicular lines are never ending.
wolverine [178]3 years ago
4 0

Answer:

90°

Step-by-step explanation:

The shelf will be perpendicular to the wall if it intersects the wall at a right angle which is equal to 90°

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I think it is 2.5,2.5
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you are purchasing carpeting for an office building the space to be carpeted is 30 feet by 50 Company A charges a 2.99 per squar
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The height of a window is 0. 6 feet less than 2. 5 times its width. If the height of the window is 4. 9 feet, which equation can
liubo4ka [24]

The equation which is used to determine x, the width of the window is, 2.5x- 0.6 = 4.9.  Option B shows the correct expression for width x of the window.

<h3>What are length and width?</h3>

Length is describing how long is the object. The width is defined as how wide is the object.

Given that the width of the window is 4.9 feet. The length is given as 0.6 feet less than 2.5 times its width.

The height of the window is given as,

H = 4.9

The other height of the window is given as,

H = 2.5 x - 0.6

When equating both equations, we get,

2.5x- 0.6 = 4.9

Therefore, an equation which is used to determine x, the width of the window is, 2.5x- 0.6 = 4.9.  Option B shows the correct expression for width x of the window.

To know more about the length and width, follow the link given below.

brainly.com/question/3133832.

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2 years ago
I need help doing everything.
ohaa [14]

Using set notations, we have that:

1. The range of the function is:

  • Inequality: x ≥ -15.
  • Set-builder: {x | x ≥ -15}
  • Interval: [-15, ∞).

2. The function is increasing on:

  • Inequality: x > 3.
  • Set-builder: {x | x > 3}
  • Interval: (3, ∞).

3. The function is decreasing on:

  • Inequality: x < 3
  • Set-builder: {x | x < 3}
  • Interval: (-∞, 3).

4. The function is negative on:

  • Inequality: 0.918 < x < 5.082.
  • Set-builder: {x | 0.918 < x < 5.082}.
  • Interval: (0.918, 5.082).

<h3>What is the standard interval notation?</h3>

The standard interval notation of an interval of lower bound a and upper bound b is given by:

[a,b].

The inequality notation is:

a ≤ x ≤ b

The set builder notation is:

{x | a ≤ x ≤ b}.

<h3>What is the range of the function?</h3>

The range of a function is the set that contains all possible output values for the function. In a graph, it is given by the values of y of the function.

Hence, for this problem, the range is given by these following notations:

  • Inequality: x ≥ -15.
  • Set-builder: {x | x ≥ -15}
  • Interval: [-15, ∞).

<h3>When is a quadratic function increasing and when it is decreasing?</h3>

Considering a concave up quadratic function, as given in this problem, we have that:

  • It decays for the values of x before the vertex.
  • It increases for the values of x after the vertex.

In this problem, the vertex is at x = 3, hence the intervals are given as follows:

2. The function is increasing on:

  • Inequality: x > 3.
  • Set-builder: {x | x > 3}
  • Interval: (3, ∞).

3. The function is decreasing on:

  • Inequality: x < 3
  • Set-builder: {x | x < 3}
  • Interval: (-∞, 3).

<h3>When a function is negative?</h3>

A function is negative when it's graph is below the x-axis. Hence, for this problem, we have that:

4. The function is negative on:

  • Inequality: 0.918 < x < 5.082.
  • Set-builder: {x | 0.918 < x < 5.082}.
  • Interval: (0.918, 5.082).

More can be learned about set notations at brainly.com/question/24462379

#SPJ1

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1 year ago
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