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zalisa [80]
3 years ago
11

Jordan is kayaking upstream. The following equation models his speed: f(x) = 2x2 − 4x − 9, where x is Anna's speed relative to l

and. What is the domain of the function? x ≥ 1 x ≤ −4 x ≥ −9 All real numbers
Mathematics
1 answer:
andrew11 [14]3 years ago
5 0

Answer:

All real numbers

Step-by-step explanation:

The given equation is:

f(x) = 2 {x}^{2}   - 4x - 9

where x is Ana's speed.

This is a quadratic function.

A quadratic function is a polynomial function.

All polynomial functions are are continuous and defined for all real values of x.

Therefore the domain of

f(x) = 2 {x}^{2}   - 4x - 9

is all real numbers.

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The total for some groceries at the store was $25.63. With 8% sales tax, what is the total? $
ozzi

Answer:

$2.05

Step-by-step explanation:

just do the math bro

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3 years ago
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How many different lines pass through a 3x3-point grid if a line only needs two points?
lions [1.4K]

Answer:

How many different lines pass through a 3x3-point grid if a line only needs two points?

Step-by-step explanation:

The answer being (93)=9! 3! 6! =9⋅8⋅73⋅2⋅1=84 possible arrangements.

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3 years ago
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Find the area of each triangle with the given heights and bases. a. h = 6 inches; b = 10 inches b. h = 9 centimeters; b = 4 cent
dsp73

The area of triangles is a. 30 inches²,   b.18 inches², and c. 130 yards² for the given triangles.

<h3>What is a triangle?</h3>

A triangle is a closed, 2-dimensional shape with 3 sides, 3 angles, and 3 vertices.

In a triangle, the sum of all three angles is 180°

Triangle is a very common figure to deal with our daily life for example in our daily life to measure the height of any tower then there is a huge application of the right angle triangle.

Area of a triangle = (1/2) × height × base

a) Given

h = 6 inches; b = 10 inches

Area = 6 × 10/2 = 30 inches².

b) Given

h = 9 centimeters; b = 4 centimeters

Area = 9 × 4/2 = 18 inches².

c) Given

h = 13 yards; b = 20 yards

Area = 13 × 20/2 = 130 yards².

Hence the area of triangles is a. 30 inches²,   b.18 inches², and c. 130 yards² .

For more information about triangle

brainly.com/question/2773823

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6 0
2 years ago
Explain what the equation 110d = 100d + 40 represents<br>in the context of the example problem.​
Tanya [424]

<em>This means that at some specific number of days the cost for Oceanview and  Beachside will be the same.</em>

<h2 /><h2>Explanation:</h2>

See the complete question in the attached file. In this exercise, we know that Oceanview charges $100 per day plus a one-time fee of $40. This can be represented by the following equation:

Total cost for Oceanview:

c=100d+40

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c=110d

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c:Represents \ the \ cost \\ \\ d:Represents \ the \ number \ of \ day

So we have to explain what the equation:

110d=100d+40

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This value was calculated and we get that<em> the cost at the hotels will be the same after 4 days and it will be $440.</em>

<h2>Learn more:</h2>

Linear equations: brainly.com/question/12412678

#LearnWithBrainly

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3 years ago
Help please!!!<br> what goes in the y for the output?
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Answer:

5, 2, 1, 2, 5

Step-by-step explanation:

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