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worty [1.4K]
3 years ago
13

Find perimeter of a regular Pentagon sides 3.3cm long

Mathematics
1 answer:
tatuchka [14]3 years ago
5 0
6.6 + 12.12 =18.18.
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If z=3 and z*y=12 what does y+5 equal
mart [117]
Z = 3                                              (This equation is a given)

z(y) = 12                                       ( This equation is also given) 

3y = 12                                         (as z = 3, plug 3 into z)

3y/3 = 12/3                                   (isolate the y by dividing 3 to both sides) 
                                                  * you divide 3 to both sides because of the equal                                                             sign. What you do to one side you do to the                                                                    other
y = 4                                             (answer for y)

y + 5                                             (what you are solving for)

(4) + 5 = 9                                    (As y = 4, plug in 4 for y in this equation)

y + 5 = 9                                       (4 + 5 =  9, or addition property)

9 is your answer           

hope this helps
5 0
3 years ago
Twelve eggs cost $2.09.How much would 18 eggs cost?
Ostrovityanka [42]
12 egg=2.09
then your adding 6 more eggs to get 18 eggs and 6 is half of 12
so you would be adding half the price
2.09/2=1.05
so then add 2.09+1.05=3.14
So 18 eggs would be $3.14

Hope this helps!! :D
8 0
3 years ago
I really need help!!!
Zigmanuir [339]

Answer:

Pr = 6.67\%

Step-by-step explanation:

Given

n = 10 i.e. 10 people

Required

Probability of being next to each other

First, we calculate the total possible arrangements (without any restriction)

Total = n!

Total = 10!

If the three are to be next to each other,

First, we arrange the three

r_1 = 3!

Now, the 3 will be seen as 1; so, we have a total of 8 people i.e. (1 + 7 others)

The arrangement is:

r_2 =8!

So, the total arrangement, when they have to be next to one another is:

r = r_1 * r_2

r = 3! * 8!

The probability is:

Pr = \frac{r}{n}

Pr = \frac{3! * 8!}{10!}

Expand

Pr = \frac{3*2*1 * 8!}{10*9*8!}

Pr = \frac{3*2*1}{10*9}

Pr = \frac{6}{90}

Pr = 0.0667

Express as percentage

Pr = 0.0667 * 100\%

Pr = 6.67\%

8 0
3 years ago
If 99 students had a mean quiz score of 82, how much is the mean score increased by the addition of a single score of 99? Explai
Leviafan [203]
The Mean would increase to 82.17 or a total increase of .17

You have 99 students and the avg is 82, therefore we can multiply 99*82 to get our total points

99*82=8118
We add a single score of 99 to our total points 8118+99= 8217

Then we add the student to the total number of students bringing it to 100 and divide our new total by the our new number of students. 
8217/100 = 82.17
8 0
3 years ago
Which is the graph of the function f(x)=1/2x2+2x-6
AveGali [126]

Answer

Step-by-step explanation:

It looks like this I believe.

Also you didn't show any picture

3 0
3 years ago
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