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2 years ago

Find the area and the circumference of a circle with radius 7 cm.

Mathematics

1 answer:

aniked [119]2 years ago

3 0

Answer:

C=14pi cm

A=49pi cm^2

Step-by-step explanation:

1) Circumference of a circle is 2piR and R=7cm

C=2pi(7)

C=14pi cm

2) Area of a circle is piR^2 and R=7cm

A=pi (7)^2

A=49pi cm^2

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Simply Each Expression

vitfil [10]

Answer:

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Step-by-step explanation:

$(\frac{2x^3}{3x^4} )^2$

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$= \frac{4}{9x^2}$

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3 years ago

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Solve for x and y. 4x-3y=16 -2x+4y=-2 DUE 2/7/17!

Trava [24]

$\left \{ {{4x-3y=16\:(I)} \atop {-2x+4y=-2\:(II)}} \right.$

Multiply the 2nd equation by (-4). This will eliminate the x's when you add the two new equations together.
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$\left \{ {{\diagup\!\!\!\!4x-3y=16} \atop {-\diagup\!\!\!\!4x+8y=-4}} \right.$
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$\boxed{\boxed{y = \frac{12}{5}}}\end{array}}\qquad\quad\checkmark$

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$4x-3y=16\:(I)$
$4x-3*( \frac{12}{5}) =16$
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least common multiple (5)
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$x = \frac{116}{20} \frac{\div4}{\div4} \to\: \boxed{\boxed{x = \frac{29}{5} }}\end{array}}\qquad\quad\checkmark$

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3 years ago

A giraffe can run up to 46.93 feet per second. how far could a giraffe run in 1.8 seconds?

shepuryov [24]

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3 years ago

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gogolik [260]

Answer:

sorry i don't really get this cause the way you explained it maybe in the comment section say it again and i might get it when you say it again.

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2 years ago

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kaheart [24]

Answer:

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2 years ago