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3 years ago

if a shape is a regular pentagon with five sides, which of the following must be true? Check all that apply

Mathematics

2 answers:

TiliK225 [7]3 years ago

8 0

Answer:

A. It has reflectional symmetry

B. It is symmetrical

D. It has five lines of symmetry

Step-by-step explanation:

julsineya [31]3 years ago

4 0

Answer:

A. It has reflectional symmetry

B. It is symmetrical

D. It has five lines of symmetry

Step-by-step explanation:

we know that

A regular pentagon has 5 sides and 5 lines of symmetry. The number of lines of symmetry in a regular polygon is equal to the number of sides

Every regular polygon has reflectional symmetry

Regular polygons are symmetrical

therefore

A. It has reflectional symmetry ------> Is true

B. It is symmetrical -----> Is true

C. It has exactly one line of symmetry ----> Is false

D. It has five lines of symmetry -----> Is true

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Ksju [112]

Answer:

$1111.11

Step-by-step explanation:

We have been given that a building contractor is to dig a foundation 50 feet long, 20 feet wide and 10 feet deep.

Let us find the volume of the dirt dig from the foundation.

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$\text{Volume of dirt dig from foundation}=10000\text{ feet}^{3}$

Since, 1 cubic feet= 0.037037 cubic yards. Let us convert volume of dirt dig into cubic yards by multiplying 10,000 by 0.037037.

$\text{Volume of dirt dig from foundation}=10000*0.037037=370.3704$

Now let us find how many truckload will hold 370.3704 cubic yards of dirt by dividing 370.3704 by 5.

$\text{Number of truckloads needed}=\frac{370.3704 }{5}$

$\text{Number of truckloads needed}=74.07408$

Now let us multiply number of truckloads by 15 to find the total cost to haul away all the dirt.

$\text{Total cost}=74.07408*15$

$\text{Total cost}=1111.1112$

Therefore, the cost to have all the dirt hauled away is $1111.11.

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3 years ago

What is the answer to: y=-2x-5,4x+3y=15 using substitution to solve it..??

MrRa [10]

Answer:

Step-by-step explanation:

Plug the first equation into the second

$4x+3(-2x-5)=15\\4x-6x-15=15\\-2x=30\\x=-15$

y=-2(-15)-5

=30-5

=25

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2 years ago

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Vitek1552 [10]

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rodikova [14]

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200 feet 12 in
------------ * --------- = 2400 inches
1 1 ft

2400 inches
----------------------- = 27.2 revolutions (answer)
[ 88 inches/ rev ]

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2 years ago

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Ymorist [56]

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