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Kisachek [45]
2 years ago
14

The triangle and rectangle have the same perimeter.find the value of x.

Mathematics
1 answer:
sesenic [268]2 years ago
5 0

Answer:

x + 5  \:  +  \: x \:  + 6 \:  + x + 7 = 2x - 1 + x + 7 + x + 7 + 2x - 1

3x + 18 = 6x + 12

18 = 3x + 12

6 = 3x

x = 6 \div 3 = 2

x = 2

<h2>I hope this helps you !! </h2>

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Answer:

Step-by-step explanation:

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3 years ago
Help pls I’ll give 50 points ! If right math ppl
Georgia [21]

f(x)=-3x

Substitute x = 5 in the equation.

f(5)=-3(5)\\f(5)=-15

Therefore, the answer is -15 or last choice when x = 5.

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2 years ago
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Please help me answer this question
avanturin [10]

By <em>direct</em> substitution and simplification, the <em>trigonometric</em> function z = cos (2 · x + 3 · y) represents a solution of the <em>partial differential</em> equation  \frac{\partial^{2} t}{\partial x^{2}} - \frac{\partial^{2} t}{\partial y^{2}} = 5\cdot z.

<h3>How to analyze a differential equation</h3>

<em>Differential</em> equations are expressions that involve derivatives. In this question we must prove that a given expression is a solution of a <em>differential</em> equation, that is, substituting the variables and see if the equivalence is conserved.

If we know that z = \cos (2\cdot x + 3\cdot y) and \frac{\partial^{2} t}{\partial x^{2}} - \frac{\partial^{2} t}{\partial y^{2}} = 5\cdot z, then we conclude that:

\frac{\partial t}{\partial x} = -2\cdot \sin (2\cdot x + 3\cdot y)

\frac{\partial^{2} t}{\partial x^{2}} = - 4 \cdot \cos (2\cdot x + 3\cdot y)

\frac{\partial t}{\partial y} = - 3 \cdot \sin (2\cdot x + 3\cdot y)

\frac{\partial^{2} t}{\partial y^{2}} = - 9 \cdot \cos (2\cdot x + 3\cdot y)

- 4\cdot \cos (2\cdot x + 3\cdot y) + 9\cdot \cos (2\cdot x + 3\cdot y) = 5 \cdot \cos (2\cdot x + 3\cdot y) = 5\cdot z

By <em>direct</em> substitution and simplification, the <em>trigonometric</em> function z = cos (2 · x + 3 · y) represents a solution of the <em>partial differential</em> equation  \frac{\partial^{2} t}{\partial x^{2}} - \frac{\partial^{2} t}{\partial y^{2}} = 5\cdot z.

To learn more on differential equations: brainly.com/question/14620493

#SPJ1

3 0
2 years ago
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Nutka1998 [239]

Step-by-step explanation:

-21 - (38)

-21-38

-(21+38)

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6 0
3 years ago
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Valerie is filling her new fish tank with water. The tank measures 36 inches by 12 inches by 20 inches. She has a bucket that sh
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Answer:

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