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3 years ago

The area of circle Z is 64 ft2.

Mathematics

2 answers:

Maru [420]3 years ago

8 0

Answer:

r=4.51 ft

Step-by-step explanation:

Area of a circle is given by

$A=\pi r^{2}$ where A is area and r is the radius. Making r the subject of the above formula then

$r=\sqrt {\frac {A}{\pi}}$

Substituting A with 64 then

$r=\sqrt {\frac {64}{\pi}}\approx 4.51 ft$

posledela3 years ago

3 0

Answer:

its 8

Step-by-step explanation:

i got it right

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I need help me with number 7

Lina20 [59]

-7=-9+n/8
Add 9 to both sides
2=n/8
Multiply 8 on both sides
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3 years ago

What is 23% of 20???????

Elan Coil [88]

It is 4.6

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2 years ago

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How do I do this? I need it in perimeter to 2 decimal places. Thank you!

ad-work [718]

Answer:

The perimeter is 127.1 cm

Step-by-step explanation:

30+25+25=80

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3 years ago

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Jack plays on a basketball team after school third day of the month he babysits every seventh day of the month how many times du

Alex787 [66]

Great question!
If you draw a calendar see attachment for mine.you will see that the dates for Basketball are
3,6,9,12,15,18,21,24,27,30
and the dates for Babysitting are
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There would only be a conflict on the 21st! So the answer is 1 time!

4 0

3 years ago

Solve this system of linear equations. separate x and y values with a comma. 7x=-67-11y 5x=-73-11y

Aleks [24]

Answer:

3, -8

(x is equal to 3 and y is equal to -8)

Step-by-step explanation:

The system:

{ 7x=-67-11y

{ 5x=-73-11y

Finding a value for x:

7x=-67-11y -> x = $-\frac{67}{7}$ - $\frac{11y}{7}$

Solving for y by plugging in our x:

[Equation] 5x = -73 -11y

[Plug-in] 5( $-\frac{67}{7}$ - $\frac{11y}{7}$ ) = -73 -11y

[Distribute the 5] $-\frac{335}{7}$ - $\frac{55y}{7}$ = -73 -11y

[Multiply by 7] 7 ( $-\frac{335}{7}$ - $\frac{55y}{7}$ ) = (-73 -11y) 7

[Simplify] -335 - 55y = -511 - 77y

[Add 335 and 77y to both sides] 22y = -176

[Divide by 22] y = -8

Plug in our y to solve for x:

5x = -73 -11y

5x = -73 -11(-8)

5x = -73 + 88

5x = 15

x = 3

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

5 0

2 years ago