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2 years ago

I don’t know if the answer i put is correct,, can someone help me?

Mathematics

1 answer:

joja [24]2 years ago

5 0

R=60pi/(2pi) (second one)
The circumference of an arbitrary circle is 2*pi*r, where r is the radius, so we can set the equation up like so, based on the info given:
2*pi*r=60*pi
r=60pi/(2pi)

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Which correctly completes this number sentence?

Lina20 [59]

Answer:

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So,( 4×2 )+x= 24

x= 24-8

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3 years ago

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Please Help ASAP <br><br> Reflect this figure across the x- axis

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3 years ago

The length of a rectangle is 5m less than three times the width, and the area of the rectangle is 50m^(2). Find the dimensions o

Ilia_Sergeevich [38]

Answer:

The width is 5m and the length is 10m.

Step-by-step explanation:

Rectangle:

Has two dimensions: Width(w) and length(l).

It's area is:

$A = w*l$

The length of a rectangle is 5m less than three times the width

This means that $l = 3w - 5$

The area of the rectangle is 50m^(2)

This means that $A = 50$ . So

$A = w*l$

$50 = w*(3w - 5)$

$3w^{2} - 5w - 50 = 0$

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this question:

$3w^{2} - 5w - 50 = 0$

$a = 3, b = -5, c = -50$

$\bigtriangleup = (-5)^{2} - 4*3*(-50) = 625$

$w_{1} = \frac{-(-5) + \sqrt{625}}{2*3} = 5$

$w_{2} = \frac{-(-5) - \sqrt{625}}{2*3} = -3.33$

Dimension must be positive result, so

The width is 5m(in meters because the area is in square meters).

Length:

$l = 3w - 5 = 3*5 - 5 = 10$

The length is 10 meters

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3 years ago

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Mekhanik [1.2K]

Answer:

Pretty sure its 5.

Step-by-step explanation:

AB should represent the space between A and B so i think it would be 5.

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