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3 years ago

Find the perimeter of the rectangle's border.

Mathematics

2 answers:

In-s [12.5K]3 years ago

8 0

I think it’s 3.55 and then it should be right

givi [52]3 years ago

3 0

It should be 3.55 have a great day

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<img src="https://tex.z-dn.net/?f=9-2%2B8%20divided%20by%20%28-9%29" id="TexFormula1" title="9-2+8 divided by (-9)" alt="9-2+8 d

Anton [14]

Answer:

your answer is -6.1111111111111

3 0

3 years ago

The general form of the equation of a circle is x2 + y2 + 42x + 38y − 47 = 0. The equation of this circle in standard form is .

Readme [11.4K]

Answer:

(-21,-19)

$\sqrt{849}$

Standard form

Step-by-step explanation:

We are given the equation of circle

$x^2+y^2+42x+38y-47=0$

General equation of circle:

$x^2+y^2+2gx+2fy+c=0$

Centre: (-g,-f)

Radius: $\sqrt{g^2+f^2-c}$

Compare the equation to find f, g and c from the equation

$g\rightarrow 21$

$f\rightarrow 19$

$c\rightarrow -47$

Centre: (-21,-19)

Radius (r) $=\sqrt{21^2+19^2+47}=\sqrt{849}$

Standard form of circle:

$(x+21)^2+(y+19)^2=849$

The centre of circle at the point (-21,-19) and its radius is $\sqrt{849}$ .

The general form of the equation of a circle that has the same radius as the above circle is standard form.

4 0

3 years ago

Read 2 more answers

Given: f(x) = 5x-10, what is f(9)?

kap26 [50]

I think the answer might be in the photo but we would need to see what we’re working with lol

3 0

3 years ago

Newton's law of cooling says that the temperature of a body changes at a rate proportional to the difference between its tempera

luda_lava [24]

Answer:

Step-by-step explanation:

Check the attachment for solutions

5 0

3 years ago

Find the length of the third side to the nearest tenth.<br> 8<br> 5

brilliants [131]

Answer:

The length of third side is: 6.3

Step-by-step explanation:

Given triangle is a right triangle where

Base = ?

Perpendicular = 5

Hypotenuse = 8

Let x be the base

As it is a right-angled triangle, Pythagoras theorem can be used to find the third side

$Hypotenuse^2 = Base^2 + Perpendicular^2$

Putting the known values

$(8)^2 = x^2 + (5)^2\\x^2 = (8)^2-(5)^2\\x^2 = 64-25\\x^2 = 39\\$

Taking square root on both sides

$\sqrt{x^2} = \sqrt{39}\\x = 6.24499$

Rounding off to the nearest 10th

Base = 6.3

Hence,

The length of third side is: 6.3

6 0

3 years ago