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Virty [35]
3 years ago
9

Find the value of the following expression: (2^8 • 5^–5 • 19^0)^–2 • (5^-2/2^3)^4 • 2^28

Mathematics
1 answer:
Maru [420]3 years ago
3 0
The value of the expression is 25
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What is the value of these coins?
Alborosie

Answer:

$2.39

Step-by-step explanation:

4 pennies=4

2 nickels=10

10 dimes=100

5 quarters=125

$2.39

3 0
3 years ago
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I don't understand this I have spent many points on this same question so this time I will be giving brainliest for the first co
Marrrta [24]

Given:

|3+4 i|+|3-4 i|+|-3+4 i|+|-3-4 i|

Solution:

Complex formula:

|a+b i|=\sqrt{(a+b i)(a-b i)}=\sqrt{a^{2}+b^{2}}

Let us simplify one by one.

|3+4 i|=\sqrt{3^{2}+4^{2}}

           =\sqrt{25}

|3 + 4i| = 5

|3-4 i|=\sqrt{3^{2}+(-4)^{2}}

           =\sqrt{25}

|3 - 4i| = 5

|-3+4 i|=\sqrt{(-3)^{2}+4^{2}}

           =\sqrt{25}

|-3 + 4i| = 5

|-3-4 i|=\sqrt{(-3)^{2}+(-4)^{2}}

           =\sqrt{25}

|-3 - 4i| = 5

Substitute these in the given expression:

|3+4 i|+|3-4 i|+|-3+4 i|+|-3-4 i|=5+5+5+5

                                                                  =20

The solution of the expression is 20.

8 0
3 years ago
Kiera pays $1.95 per song<br> she downloads.
Step2247 [10]

Answer:

1 song = $1.95

2 songs = $3.90

3 songs= $5.85

4 songs= $7.80

Explanation:

it's simple multiplying

6 0
2 years ago
Simplify :<br> -2n - (9 - 10n) <br><br> 9a + 10 ( 6a - 1)
Hatshy [7]
-2n-9-10n
69a-10
Hope this helps
7 0
2 years ago
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Sophie Ruth is eating a 50-gram chocolate bar which contains 30%, percent cocoa.
MrRissso [65]
Grams of cocoa =30% of 50g=(30/100) * 50 g=(30 * 50 g)/100=15 g

Soltution: 15 g
7 0
3 years ago
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