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german
3 years ago
14

Jordan received 9 text messages last week.She received 3 times more text message this week than last week. How many text message

s did Jordan received this week?
Mathematics
2 answers:
vazorg [7]3 years ago
8 0
If she got 9 messages last week and 3rimes as much this week then she got 27 messages because 9x3=27
larisa86 [58]3 years ago
8 0

The answer is 27 text messages. Just times the text messages from last week by 3.

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A metalworker has a metal alloy that is 15​% copper and another alloy that is 60​% copper. How many kilograms of each alloy shou
coldgirl [10]

18 kg of 15% copper and 72 kg of 60% copper should be combined by the metalworker to create 90 kg of 51% copper alloy.

<u>Step-by-step explanation:</u>

Let x = kg of 15% copper alloy

Let y = kg of 60% copper alloy

Since we need to create 90 kg of alloy we know:

x + y = 90

51% of 90 kg = 45.9 kg of copper

So we're interested in creating 45.9 kg of copper

We need some amount of 15% copper and some amount of 60% copper to create 45.9 kg of copper:

0.15x + 0.60y = 45.9

but

x + y = 90

x= 90 - y

substituting that value in for x

0.15(90 - y) + 0.60y = 45.9

13.5 - 0.15y + 0.60y = 45.9

0.45y = 32.4

y = 72

Substituting this y value to solve for x gives:

x + y = 90

x= 90-72

x=18

Therefore, in order to create 90kg of 51% alloy, we'd need 18 kg of 15% copper and 72 kg of 60% copper.

6 0
3 years ago
Is the answer C ; y= -3x-1
Sonja [21]

Answer:

I believe you are correct

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3 years ago
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The ratio of coloured papers to wight papers is 3:8.If there are 48 wight papers, how many coloured papers are there?
mestny [16]

Answer:  The total number of colored papers is 18.

Step-by-step explanation:

Given: The ratio of coloured papers to wight papers is 3:8.

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Since, there are 48 wight papers , then

8x=48

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2 years ago
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seropon [69]

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6 0
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fenix001 [56]

Answer:

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(They are the same thing.)

6 0
3 years ago
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