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3 years ago

The perimeter of a regular pentagon is 17.5 inches. What is the length of each side? 3.5 in. 4 in. 5.8 in. 87.5 in.

Mathematics

1 answer:

Fantom [35]3 years ago

5 0

Answer:

3.5 in.

Step-by-step explanation:

17.5 ÷ 5 = 3.5

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(-8)(-5) = _<br> What’s the answer

Setler [38]

Answer:

Step-by-step explanation:

-8*-5=40

two negatives equal a positive

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3 years ago

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What is the slope of the line shown below?<br><br> (9, 1) and (-3, -7

Dima020 [189]

Answer:

The slope is 4

Step-by-step explanation:

I think it's right

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3 years ago

Solve the equation. StartFraction dx Over dt EndFraction equals StartFraction 1 Over x e Superscript t plus 7 x EndFraction An i

MAVERICK [17]

Answer:

$\frac{1}{49}(7x-1)e^{7x}+e^{-t}=C$

Step-by-step explanation:

We are given that

$\frac{dx}{dt}=\frac{1}{xe^{t+7x}}$

We have to find the implicit function

Using separation variable method

$\frac{dx}{dt}=\frac{1}{xe^t\cdot e^{7x}}$

By using property $x^a\cdot x^y=x^{a+y}$

$xe^{7x}dx=e^{-t}dt$

By using property $\frac{1}{x^a}=x^{-a}$

Taking integration on both sides

$\int xe^{7x}dx=\int e^{-t}dt$

Parts integration method

$\int u\cdot v dx=u\int vdx-\int (\frac{du}{dx}\int vdx)dx$

By parts integration method

$x\int e^{7x}dx-\int (\frac{dx}{dx}\int e^{7x}dx)dx=-e^{-t}+C$

Using formula $\int e^{ax} dx=\frac{e^{ax}}{a}+C$

$\frac{xe^{7x}}{7}-\frac{1}{7}\int e^{7x}dx=-e^{-t}+C$

$\frac{xe^{7x}}{7}-\frac{1}{49}e^{7x}+e^{-t}=C$

$\frac{1}{49}(7x-1)e^{7x}+e^{-t}=C$

We are given that

$F(x,t)=C$

$F(x,t)=\frac{1}{49}(7x-1)e^{7x}+e^{-t}=C$

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3 years ago

How is the number 0.000005 written in scientific notation?

nirvana33 [79]

Answer: The answer is A. 5.0 x 10-5

i hope it helps. Have a nice day

Step-by-step explanation:

the decimal number 0.00005 written in scientific notation is 5 × 10-5

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3 years ago

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+{-x2y+[-(x2y-2xy2+y2)+(-xy2-3y2+x2y)]-(10y2-x2y)}

Kay [80]

Answer:

3xy² - 14y²

Step-by-step explanation:

I hope that this is the problem

- x²y + [ - (x²y - 2xy² + y²) + (xy² - 3y² + x²y)] - (10y² - x²y)

= - x²y + [ - x²y + 2xy² - y² + xy² - 3y² + x²y] - 10y² + x²y

Now combine like terms in the [ ].

= - x²y + [ -x²y + x²y + 2xy² + xy² - y² - 3y² ] - 10y² + x²y

= - x²y + [ 0 + 3xy² - 4y²] - 10y² + x²y

= - x²y + 3xy² - 4y² -10y² + x²y Now combine like terms

= (-x²y + x²y) + 3xy² + (-4y² - 10y²)

= 0 + 3xy² - 14y²

= 3xy² - 14y² or y²(3x - 14)

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3 years ago