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2 years ago

Abby can paint 1/3 of her room in 30 minutes.at what rate could she paint her room?

Mathematics

2 answers:

BigorU [14]2 years ago

8 0

Answer:

To paint the room it would take 90 minutes, the rate is that she can paint 1/30 of her room each minute

Step-by-step explanation:

MatroZZZ [7]2 years ago

3 0

Answer:

3mper min

Step-by-step explanation:

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Select all of the fractions that are equivalent to -2/3 –3/-2 -3/2 2/-2 2/-3 2/3 -2/-3 Please hurry and help I really need it

lianna [129]

Answer:

2/-3

Step-by-step explanation:

Hope this helped. And I know that you can choose more than one, but I'm pretty sure this is the only one that's equivalent to -2/3

5 0

3 years ago

The perimeter of equilateral triangle ABC is 81/3 centimeters, find the length of the radius and apothem.

MAXImum [283]

There is a typo error, the perimeter of equilateral triangle ABC is 81/√3 centimeters.

Answer:

Radius = OB= 27 cm

Apothem = 13.5 cm

A diagram is attached for reference.

Step-by-step explanation:

Given,

The perimeter of equilateral triangle ABC is 81/√3 centimeters.

Substituting this in the formula of perimeter of equilateral triangle = $3\times\ side$

$3\times\ side$ $=[tex]81\sqrt{3}$

$Side = \frac{81\sqrt{3} }{3} =27\sqrt{3} \ cm$

Thus from the diagram , Side $AB=BC=AC= 27\sqrt{3} \ cm$

We know each angle of an equilateral triangle is 60°.

From the diagram, OB is an angle bisector.

Thus $\angle OBC = 30$ °

Apothem is the line segment from the mid point of any side to the center the equilateral triangle.

Therefore considering ΔOBE, and applying tan function.

$tan\theta =\frac{perpendicular}{base} \\tan\theta=\frac{OE}{BE} \\tan\theta=\frac{OE}{\frac{27\sqrt{3}}{2} } \\tan30\times {\frac{27\sqrt{3} }{2} }= OE\\\frac{1}{\sqrt{3} } \times\frac{27\sqrt{3} }{2} =OE\\$

Thus ,apothem OE= 13.5 cm

Now for radius,

We consider ΔOBE

$cos\theta=\frac{base}{hypotenuse} \\cos30= \frac{BE}{OB} \\Cos30 = \frac{\frac{27\sqrt{3} }{2}}{OB} \\OB= \frac{\frac{27\sqrt{3} }{2}}{cos30} \\OB= \frac{\frac{27\sqrt{3} }{2}}{\frac{\sqrt{3} }{2} } \\OB =27 \ cm$

Thus for

Perimeter of equilateral triangle ABC is 81/√3 centimeters,

The radius of equilateral triangle ABC is 27 cm

The apothem of equilateral triangle ABC is 13.5 cm

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3 years ago

A) NO CHANGE

ollegr [7]

The most appropriate choice for sentence correction will be given by:

<h3>What is sentence correction?</h3>

Sentence correction is a type of grammatical practice where a sentence is given with a word or a phrase that requires grammatical changes or improvement.

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In the given sentence, "Wilmers and Estes caution, however, that <u>having more otters</u> will not automatically solve the problem of higher levels of carbon dioxide in the air".

The most appropriate choice for sentence correction will be given by: the otters multiplying (option B).

To learn more about sentence correction, refer to the link: brainly.com/question/14632568

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1 year ago

What is the missing number on the number line?

Nataliya [291]

The answer is 17
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3 years ago

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Jo's house is located at (-4,-2), Elenas house is a reflection of Jo's house across the x-axis. What is the coordinate of Elenas

Snowcat [4.5K]

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3 years ago