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docker41 [41]
2 years ago
13

Solve for x. Round your answer to the nearest tenth if necessary.

Mathematics
2 answers:
diamong [38]2 years ago
6 0

Answer:

x ≈ 17.5

Step-by-step explanation:

using Pythagoras' identity in the right triangle.

the square on the hypotenuse is equal to the sum of the squares on the other 2 sides , that is

x² = 9² + 15² = 81 + 225 = 306 ( take square root of both sides )

x = \sqrt{306} ≈ 17.5 ( to the nearest tenth )

Maslowich2 years ago
6 0
Answer: x= 17.5

Explanation:
9^2 + 15^2= 81 + 225 =306
And the square root of 306 is 17.49 and you ask for it to be rounded to the nearest tenth so it will be 17.5.
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Do the top please, been trying for hours to solve
scoray [572]

Answer:

2x+30

Step-by-step explanation:

The perimeter of a rectangle is

P = 2(l+w)

The length is 2/3 x+10  and the width is 1/3x +5

P = 2(2/3x +10 + 1/3x +5)

Combine like terms

P = 2(2/3x + 1/3x +10+5)

   = 2(x +15)

Distribute the 2

   = 2x+30

7 0
3 years ago
Read 2 more answers
If BD = 4, AD = x-6, and CD = x, what is the length of CD?
emmainna [20.7K]

Answer:

The length of CD is 8 units

Step-by-step explanation:

<u><em>The complete question in the attached figure</em></u>

we know that

According to the Right Triangle Altitude Theorem,

(BD)^2 = (AD)(CD)

substitute the given values

(4)^2 = (x-6)(x)

16=x^2-6x\\x^2-6x-16=0

solve the quadratic equation by graphing

The solution is x=8 or x=-6

see the attached figure N 2

Discard the negative length.

therefore

The length of CD is 8 units

8 0
3 years ago
Pls help me this is urgentttt i need to find the surface area of this
vladimir1956 [14]

Answer:

1546 in

Step-by-step explanation:

6 0
3 years ago
4 2/5 + k = −3 2/11<br><br> What is k?
Aleks [24]

Answer:

Step-by-step explanation:

4⅖ = 22/5 = 242/55

-3 2/11 = -35/11 = -175/55

k = -175/55 - 242/55 = -417/55 = -7 32/55

8 0
3 years ago
Describe the x-values for which (a) f is increasing or decreasing, (b) f(x) &gt; 0 and (c) f(x) &lt; 0
Kryger [21]

(a) The function "f" is increasing for the x-values of [(-∞) < x ≤ 0] and            [2 < x < ∞], while "f" is decreasing for the x-values of [0 < x ≤ 2].

(b) The function f(x) is greater than 0 at [(-1) < x < ∞], excluding the point  (x = 2)

(c) The function f(x) is less than 0 when [x < (-1)]

In the reference attachment attached along with the question statement, we are provided with a graph of a certain function "f",

And as per the question statement, we are required to determine the x-values for the following:

(a) for which "f" is increasing or decreasing,

(b) [f(x) > 0]

(c) [f(x) < 0]

From the graph, it is very clear that, the slope is rising from [(-∞) < x ≤ 0] and [2 < x < ∞], while, declining from [0 < x ≤ 2] of the x-axis. Therefore,

(a) The function "f" is increasing for the x-values of [(-∞) < x ≤ 0] and            [2 < x < ∞], while "f" is decreasing for the x-values of [0 < x ≤ 2].

(b) The function f(x) is greater than 0 at [(-1) < x < ∞], excluding the point  (x = 2)

(c) The function f(x) is less than 0 when [x < (-1)]

To learn more about x-values of increasing or decreasing functions, click on the link below.

brainly.com/question/28912753

#SPJ1

7 0
1 year ago
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