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lapo4ka [179]
3 years ago
10

Mary has nickels and dimes in her purse. She has a total of 30 coins worth $2.40. How many nickels does Mary have?​

Mathematics
1 answer:
V125BC [204]3 years ago
5 0

Answer:

72 nickels idk why she has so many

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find the sum of 301+73+27 , mentally, using the associative property of addition. Show how you can use the property to group two
Zolol [24]

Answer:

401

Step-by-step explanation:

301 + 73 + 27

Using the correct order of operations, you would start by adding 301 to 73. Then you'd add 27 to that sum.

Using the associative property of addition, you change the grouping to add 73 and 27 first since that equals 100, and it's easy to add 100 to 301 mentally.

301 + 73 + 27 =

= 301 + (73 + 27)

= 301 + 100

= 410

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Find the indicated sum for each sequence. S9 of –9, 36, –144, 576, ... A –585 B –471,861 C 1,887,435 D –471,852
Varvara68 [4.7K]
<h3>Answer: Choice B)  -471,861</h3>

=====================================================

Explanation:

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The common ratio is r = -4. The first term is a = -9. We want to sum up n = 9 terms.

Use the geometric nth partial sum formula below to plug in the terms mentioned

S_n = \frac{a*(1-r^n)}{1-r}\\\\S_9 = \frac{-9*(1-(-4)^9)}{1-(-4)}\\\\S_9 = \frac{-9*(1-(-262144))}{1+4}\\\\S_9 = \frac{-9*(1+262144)}{1+4}\\\\S_9 = \frac{-9*(262145)}{5}\\\\S_9 = \frac{-2359305}{5}\\\\S_9 = -471,861\\\\

3 0
3 years ago
The coordinate grid below shows triangle GHI. The triangle is translated 6 units to the left and 5 units down to create a new tr
Thepotemich [5.8K]

Answer:

There are multiple answers, choose one

F. (x, y) (x + 6, y + 5)

G. (x, y) (x - 6, y - 5)

H. (x, y) (x - 6, y + 5)

J. (x, y) (x + 6, y - 5)

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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