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wlad13 [49]
3 years ago
15

What single percentage change is equivalent to a 15% decrease followed by a 16% decrease?

Mathematics
1 answer:
Neko [114]3 years ago
7 0
Decrease of 28.6%.

Step-by-step explanation:

The multiplier for a increase of a% is 1 + a/100.

The multiplier for a decrease of b% is 1 - b/100.

Decrease of 15%

1- 15/100 = 1- 0.15 = 0.85

Decrease of 16%

1- 16/100 = 1 - 0.16 = 0.84

Both:

0.85*0.84 = 0.714

Change:

The initial percentage is 100% = 1.

0.714 - 1 = -0.286

Negative, so a decrease

The answer is a decrease of 28.6%.
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Answer:

x=y+4

Step-by-step explanation:

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3 years ago
- Mariah is looking at her bank account and sees that she is in debt $40. She plans to buy dinner
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Answer:  5 friends

Note: if Mariah pays for her own meal, then it would drop to 4 friends.

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

Explanation:

Add up the amount she earns:

30.25+25.75+11 = 67

Now add up the amounts that she's either in debt or that she spends money on. Ignore the dinner portion for now.

40+2 = 42

She earns $67 total and has to spend $42, without including the dinner portion just yet. That means Mariah has 67-42 = 25 dollars left over.

-------------------

Let x be the number of $5 meals she can buy

So she can spend a total of 5x dollars here. Set this equal to 25 (the amount left over) and solve for x.

5x = 25

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7 0
3 years ago
20 points!<br><br> what percent is equivalent to 12/30?<br> show work pls
Mashutka [201]

Answer:

Hello, Your answer will be 40%

40%

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<em>Have a Great Day!</em>

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Nikitich [7]

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Step-by-step explanation:

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A

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