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11Alexandr11 [23.1K]
3 years ago
13

Help. Only #21 thanks

Mathematics
1 answer:
Debora [2.8K]3 years ago
6 0
This the how you doit
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Ksju [112]

Answer:

x= 29/15

Step-by-step explanation:

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3 years ago
Mark purchased a Playstation on sale at a 40%
Roman55 [17]
The amount of the discount was $140.

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Given: 5n-42=12n prove: n=-6
Vikentia [17]

Answer:

n=-6

Step-by-step explanation:

5n-42=12n

5n=12n+24

5n-12n=42

-7n=42

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3 0
3 years ago
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In a box there are six envelopes each containing two cards. Three of the envelopes contain two red cards, two of them contain a
Sphinxa [80]

Answer:

\frac{2}{5}

Step-by-step explanation:

3 envelopes having 2 red card

2 envelopes having 1 red card and 1 black card

1 envelope having 2 black cards

We are given that . An envelope is selected at random and a card is withdrawn and found to be red.

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No. of required ways of envelope having 1 red card and 1 black card = 2

So, probability of getting an envelope having 1 red card and 1 black card = \frac{2}{5}

Hence The chance the other card is black is \frac{2}{5}

5 0
2 years ago
What is the answer to this 8⁄10 – 1⁄5
AnnZ [28]
1/80 = 0.0125
1/5 = 0.2

0.0125-0.2 = -0.1875
-0.1875 = -3/16
7 0
3 years ago
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