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Setler79 [48]
3 years ago
7

The price of a notebook was $3.70 yesterday. Today, the price fell to $3.20. Find the percent decrease

Mathematics
1 answer:
jeyben [28]3 years ago
6 0

Answer:

86% Decrease

Step-by-step explanation:

3.70 times x= 3.20      3.20 divided by 3.70= 0.86

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Please help! This is due in less that 10 minutes! (Will mark Brainliest!)
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Answer:

<em>Answer: a = - 12</em>

Step-by-step explanation:

We have here two equations, one 18x + 12y = 36, the other ax - 8y = - 24;

Now if we were to consider making these two equations have a common y co - efficient, we would multiply the top equation by 2, the bottom consecutively by - 3. This would make a standard 24y ;

2 * ( 18x + 12y = 36 ),     ⇒       36x + 24y = 72

+ - 3 * (  ax - 8y = - 24 )            + - 3ax + 24y = 72

As you can see, all terms are equivalent, besides that of the co - efficient of x. Knowing that, it would be ax must be multiplied by - 3 to receive 36x, as the bottom equation is multiplied by - 3, where all terms are equivalent to the top terms;

- 3 * ax ⇒ 36x, - 3 * - 12x = 36x,

<em>Answer: a = - 12</em>

8 0
3 years ago
Given f(x) = -* -<br> - 5, solve for x when f(x) = -3.
Ne4ueva [31]

Answer:

x = -2

Step-by-step explanation:

Step 1: Define

f(x) = -x - 5

f(x) = -3

Step 2: Substitute and Evaluate

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x = -2

7 0
3 years ago
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Answer:

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Step-by-step explanation:

because 13% died

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