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BartSMP [9]
2 years ago
5

What the radius of a circle with an area of 64 square feet

Mathematics
2 answers:
VMariaS [17]2 years ago
7 0

Answer:

4.51 ft

Step-by-step explanation:

solmaris [256]2 years ago
6 0
A=pir²
64=pir²
divide both sides by pi
64/pi=r²
sqrt both sides
8/√pi=r
(8√pi)/pi=r
aprox
4.51352=r

about 4.5ft is the radius
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(-4, 7), (-6,-4)<br> what is the slope ?
katrin [286]

Answer:

\frac{11}{12}

Step-by-step explanation:

See pic.

3 0
2 years ago
Plz help I don’t know the answer
Dahasolnce [82]
Are there options for the answers or not? If there is add the options.
5 0
2 years ago
8/x-5 - 9/x-4 = 5/x^2-9x+20
adelina 88 [10]
If you're using the app, try seeing this answer through your browser:  brainly.com/question/2752942

_______________


Solve the equation:

\mathsf{\dfrac{8}{x-5}-\dfrac{9}{x-4}=\dfrac{5}{x^2-9x+20}\qquad\qquad(x\ne 5~and~x\ne 4)}


Reduce the fractions at the left side so that they have the same denominator:

\mathsf{\dfrac{8(x-4)}{(x-5)(x-4)}-\dfrac{9(x-5)}{(x-4)(x-5)}=\dfrac{5}{x^2-9x+20}}\\\\\\&#10;\mathsf{\dfrac{8x-32}{x^2-4x-5x+20}-\dfrac{9x-45}{x^2-4x-5x+20}=\dfrac{5}{x^2-9x+20}}\\\\\\&#10;\mathsf{\dfrac{8x-32}{x^2-9x+20}-\dfrac{9x-45}{x^2-9x+20}=\dfrac{5}{x^2-9x+20}}\\\\\\&#10;\mathsf{\dfrac{8x-32-(9x-45)}{x^2-9x+20}=\dfrac{5}{x^2-9x+20}}


Numerators must be equal:

\mathsf{8x-32-(9x-45)=5}\\\\&#10;\mathsf{8x-32-9x+45=5}\\\\&#10;\mathsf{8x-9x=5+32-45}\\\\&#10;\mathsf{-x=-8}\\\\&#10;\mathsf{x=8}\quad\longleftarrow\quad\textsf{this is the solution.}


I hope this helps. =)


Tags:  <em>rational equation fraction solution algebra</em>

7 0
2 years ago
I don't understand the bottom questions. Please help, it's due for tomorrow!
Elena-2011 [213]
I am giving the answers only.

2/5

4/7

5/11

1/5

2/3

3/5

2/15

1/2
3 0
3 years ago
36x^2-21x-30 factor
miv72 [106K]
Easy...

to even begin to factor..you must factor out a 3, to simplify your answer.

3(12x^{2}-7x-10)

Now, you can factor.

3(12 x^{2} -7x-10)

So..to find the answer...

12*-10=-120x
and 
you would use -7x

What multiplies to -120..but adds to -7?

-15*8=-120
and
-15+8=-7

To find the answer, plug in what you know..

3(3x+2)(4x-5)

Thus, your answer.
8 0
3 years ago
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