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3 years ago

A circle has a diameter of 5. What is the area and circumference.

Mathematics

2 answers:

ivann1987 [24]3 years ago

5 0

Area:7 circumference:15

Aloiza [94]3 years ago

3 0

Answer:

Area= 19.63 units squared Circumference= 15.71 units

Step-by-step explanation:

Area= π r ^2

Circumference= 2π r

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3/4 (x +21) = 10 1/2<br> What does x equal?

Elena L [17]

Answer:

$\huge \boxed{ \boxed{ \red{x = - 7}}}$

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>

equation
PEMDAS

<h3>let's solve:</h3>

$\sf distribute : \\ \frac{3 x+ 63}{4} = 10\frac{1}{2}$
$\sf simplify \: mixed \: fraction : \\ \frac{3x + 63}{4} = \frac{21}{2}$
$\sf cross \: multipication : \\ 2(3x + 63) = 84$
$\sf distribute \: 2 : \\ 6x + 126 = 84$
$\sf cancel \: 126 \: from \: both \: sides : \\ 6x + 126 - 126 = 84 - 126 \\ 6x = - 42$
$\sf divide \: both \: sides \: by \: 6 : \\ \frac{6x}{6} = \frac{ - 42}{6} \\ \bcancel{\frac{6x}{6} } = \frac{ \cancel{ - 42} \: ^{ - 7} }{ \cancel{ \: 6}} \\ \therefore \: x = - 7$

3 0

3 years ago

Read 2 more answers

Follow the rule x2+2 to complete the pattern of 8

lilavasa [31]

I think your saying 8=x if that is the case then you would plug it in (8)2+2 which would equal 18

4 0

4 years ago

Round 961 to one significant figure

oksano4ka [1.4K]

1000 because i rounded the hundreth's to get one significant figure, and anything more than 5 is rounded up, anything less than 5 is rounded down.

Hope i did some use! <3

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3 years ago

Assume that y varies directly with x. If y=9 when x=−3, find x when y=6.

Dafna1 [17]

Answer:-2

Step-by-step explanation:

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3 years ago

I just need Y. I already found X

garri49 [273]

Y = 54.

This is really complicated to explain, but since x is 36 and the angle on the other side of the known angle is also 36, that makes y 54. Each pair of angles has to equal to 90 degrees.

Hope this helps!

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2 years ago