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Mkey [24]
3 years ago
15

by selling old CDs Sarah has a store credit for $153. A new CD costs $18. What are the possible numbers of new CDs Sarah buy wri

te and solve an inequality
Mathematics
1 answer:
kherson [118]3 years ago
7 0
18x < = 153 (that is a less then or equal sign)
x < = 153/18
x < = 8.5...Sarah can get 8 or less cd's
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sladkih [1.3K]

Answer:

Quadrant 4

Step-by-step explanation:

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3 years ago
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What is 2a・420 divided by 3z when z=34 and a=56
Maksim231197 [3]

461.176470588

Explanation:

2×56=112

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

3×34=102

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3 years ago
Show all work to solve the equation for x. If a solution is extraneous, be sure to identify it in your final answer.
IRISSAK [1]

Answer:

There is one extraneous solution at x = 4

The only solution is x=7

Step-by-step explanation:

Given:

The equation to solve is given as:

\sqrt{x-3}+5=x

In order to solve, we will first isolate the radical part.

<em>Adding -5 on both the sides, we get:</em>

\sqrt{x-3}+5-5=x-5\\\sqrt{x-3}=x-5

<em>Now, squaring both the sides, we get:</em>

(\sqrt{x-3})^2=(x-5)^2\\\\x-3=x^2+25-10x\\\\x^2-10x-x+25+3=0\\\\x^2-11x+28=0\\\\(x-4)(x-7)=0\\\\x=4\ or\ x=7

Now, let us check whether the calculated values satisfy the equations or not.

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At x=4,

\sqrt{4-3}+5=4\\\sqrt1+5=4\\1+5=4\\6=4

But, 6 is not equal to 4 and hence 4 is not a solution to the given equation. It is an extraneous solution for the given equation.

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\sqrt{7-3}+5=7\\\sqrt4+5=7\\2+5=7\\7=7(True)

Therefore, x=7 is a solution to the equation.

Hence, there is one extraneous solution at x = 4

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4 years ago
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kogti [31]
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<span>If the pavers were 1 foot by 1 foot we would need 168 pavers </span>

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<span>It is 2/3 times 2/3 or 4/9 square ft </span>

<span>168 divided by 4/9 </span>

<span>which is the same as 168 times 9/4 </span>

<span>That will get you to 378.</span>
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4 years ago
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Answer:

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