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denpristay [2]
3 years ago
13

Pls answer. i will mark u as branliest

Mathematics
1 answer:
Artemon [7]3 years ago
3 0

Answer:

540°

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

A pentagon has n = 5, thus

sum = 180° × 3 = 540°

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June bought three books. For the first book, she paid one half of her allowance plus $1 more. For the second book, she paid one
inysia [295]

Answer:

$34

Step-by-step explanation:

I'd work backwards.

For the third book, she paid all her remaining money. The problem says she paid "1/2 her leftover money + $3". This means that: (let m = money used to buy book 3)

m = 1/2m + 3

1/2m = 3

m = 6

For the second book: (let n = money before book 2)

n - m (money left after book 2) = 1/2n + 2

1/2n +2 is money used up for book, which is the same as n-m.

n = 1/2n + 2 + m

1/2n = 2 + m = 2 + 6

1/2n =8

n = 16

For the first book, she spent 1/2 her money + 1. If o = money before book 1 (or the whole allowance):

o - n = 1/2o + 1

o = 1/2o + n + 1 = 1/2o + 16 + 1

1/2o = 17

o = 34

Check!

Spent 17 (half 34) + 1 on book 1

16 left

Spent 8 (half 16) +2 on book 2

6 left

Spent 3 (half 6) + 3 on book 3

0 left

4 0
3 years ago
Please help i cant figure this out
rewona [7]

Answer:

15

Step-by-step explanation:

First do, 30% + 45% = 75%. Then do, 100-75=25.

Lastly,

proportions:

   x/60 = 25/100

So your answer is, 15.

4 0
3 years ago
Whats the square root of 42​
katovenus [111]

Answer:

6.48....

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
4 and 2/5 - 2 and 4/5
Mademuasel [1]

Answer:1.6

Step-by-step explanation:Hope this helps

5 0
3 years ago
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Help pls i need this righnow
Ierofanga [76]

Answer:

c true

Step-by-step explanation:

1st u read the problem and thensolve the problem

5 0
2 years ago
Read 2 more answers
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