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Zepler [3.9K]
3 years ago
12

What is the unit rate for 14 lb for $2.99

Mathematics
1 answer:
Alexeev081 [22]3 years ago
4 0
How much for 1lb
2.99/14=0.213/1=$0.21

it is 21 cents per lb
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What are the excluded values of x for x^2-9x/x^2-7x-18
Crazy boy [7]
The expression is \displaystyle{\frac{x^2-9x}{x^2-7x-18}.

The excluded values are those values of x for which the denominator, x^2-7x-18, becomes zero.

So, we need to factorize the expression x^2-7x-18.


To factorize the expression, we can use the grouping method. Write -7x as -9x+2x to create 4 terms, as follows:

                          x^2-7x-18=(x^2-9x)+(2x-18)=x(x-9)+2(x-9).

The, factorizing (x-9), we have (x-9)(x+2).

This expression becomes 0 for x=-2, or for x=9.


Answer: {-2, 9}
8 0
3 years ago
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Susan paid $240 to have her house decorated. The materials used to decorate the house cost $115, and service was charged at five
Setler [38]

Answer:

25 hours

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3 years ago
Please help me i rlly need it
iogann1982 [59]

Answer:

8.2

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Use cosine law:

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BC = 8.2 (nearest tenth)

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Round the following numbers as indicated: a) To four sig. figs.: 1. 21.860051 = 2. 5.687524 3. 112.511 b) To two sig figs: 1. 79
Maksim231197 [3]

Step-by-step explanation:

21.86

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NikAS [45]
The element gold (au) occurs in the 6th period
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