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marshall27 [118]
3 years ago
10

The number of vertices in a pyramid is equal to the number of faces. How many vertices does a regular pyramid with 40 edges have

?
Mathematics
1 answer:
Anastaziya [24]3 years ago
5 0

Answer:

There would be 21 vertices.

Step-by-step explanation:

Remember that the Euler's formula states that

                      V   -  E   + F  =    2

According to the problem V = F , so

       2V    -  E   = 2

and   E = 40. Therefore  

2V - 40  = 2    and  , V = 21 , and there would be 21 vertices.

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A Walgreens purchase comes to $28. Find the total cost if a 2% sales tax is included.
OverLord2011 [107]

Answer:

The answer is $28.56

Step-by-step explanation:

To find the 2% sales tax, you need to multiply the 2% or 0.02 by 28.

Doing this will give you 0.56.

Then you add 0.56 to 28 to get 28.56, hence, $28.56 is the total cost.

Hope it helps!

4 0
3 years ago
A pencil and ruler cost 1.50 together. The ruler is 1.00 more. How much is pencil
Stella [2.4K]
Ok so the solution which greenrune will (hopefully) correct


total is 1.5
p+r=1.5
rule is 1 more than pencil
r=1+p
sub 1+p for r
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minus 1 from both sides
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divide both sides by 2
p=0.25

pencil=$0.25
3 0
3 years ago
Read 2 more answers
Leah wants to find 450 + 416 using place value. Write the smaller problems she could use to find the sum. then find the sum.
Gennadij [26K]

Answer:

866

Step-by-step explanation:

She could add the hundreds first: 400+400=800

Then the tens: 50+10=60

Then the ones: 0+6=6

And add them all up: 800+60+6=866

5 0
2 years ago
Read 2 more answers
Can u help me do this
chubhunter [2.5K]
There will be 2 books left over if he fills each box.
7 · 4 = 28
30 - 28 = 2

Good Luck
5 0
3 years ago
PLEASE GIVE ME ANSWERS
matrenka [14]
They are all eawualateral
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