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Ivan
3 years ago
13

Which expression correctly represents the perimeter of a rectangle that is 12 centimeters long and 7 centimeters wide?

Mathematics
2 answers:
Maurinko [17]3 years ago
5 0

Answer: 2(12\ cm)+2(7\ cm)

Step-by-step explanation:

We know that the formula to find the perimeter of a rectangle is given b y:-

P=2(l+w) , where l is length and w is width.

Then, the expression that correctly represents the perimeter of a rectangle that is 12 centimeters long and 7 centimeters wide will be :-

P=2(12\ cm+7\ cm)\\\\=2(12\ cm)+2(7\ cm)

Hence, D is the correct option.

iren2701 [21]3 years ago
3 0
D.
That is what i do 12 x 2 will equal 24 since the are 2 parallel sides like in a rectangle. and it will be the same concept on the other side 7 x 2 = 14 and 24 + 14 will equal 38 
hope this helped and is how you are supposed to work it

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Use the difference of cubes identity to write the expression x3 – 64 in factored form.
Elena-2011 [213]

Answer:

Hey there!

We have:

x^3-64

x^3-4^3

(x-4)(x^2+4x+16)

Let me know if this helps :)

3 0
3 years ago
PLEASE HELP..... I WILL GIVE BRAINLIEST!!
Yakvenalex [24]
For the first part:

Every shirt she grabs, will cost her dollars, so if she grabs 3 shirts, then the cost of the shirts is:

12+12+12=3(12)

With the same rationale, if she grabs 2 pairs of jeans, the cost of the jeans is:

19+19=2(19)

So, her total is:

3(12)+2(19)

If you subtract 3 from the total, then the expression is:

3(12)+2(19)-3=36+38-3=71

For the second part:

If she's paying 3 less for each shirt, then the cost of 3 shirts will become:

(12-3)+(12-3)+(12-3)=3(12-3)

In the same fashion, for the two jeans:

(19-3)+(19-3)=2(19-3)

So the expression for the total cost is:

3(12-3)+2(19-3)=36-9+38-6=59

For number three:

The amounts are different because the cost of the total purchase is different than the cost of each element that makes up the total purchase.

For number four:

If you're the owner, you want to give the smallest amount of discount (the one in part 1/a).

So you could clarify by saying there's 3 dollars of the TOTAL purchase's cost.
6 0
3 years ago
Need some help with this please
saveliy_v [14]
-0.83 for it’s the lowest number
5 0
3 years ago
What is the length of the diagonal of of the rectangle
iren [92.7K]

Step-by-step explanation:

use formula of length of the diagonal of rectangle equal to d/rt2

6 0
3 years ago
Six hundred paving stones were examined for cracks, and 15 were found to be cracked. The same 600 stones were then examined for
9966 [12]

Answer: 0.01

Step-by-step explanation:

Let the events are :

C = paving stones found to be cracked.

D = paving stones found to be discolored.

Given : Total stones : T = 600  (i)

C = 15

D=  27

C'∩D'=  564   (ii)

Since C'∩D' = (C∪D)' = T- C∪D         (iii)

From (i) , (ii)and (ii) , we have

564 = 600- C∪D

⇒ C∪D=600- 564= 36

Formula : C∩D= C+D- C∪D

Put values , we get

C∩D= 15+27-36=6

Now ,

P(C\cap D)=\dfrac{C\cap D}{T}=\dfrac{6}{600}=0.01

The probability that it is both cracked and distorted is 0.01.

4 0
3 years ago
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