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Harrizon [31]
3 years ago
6

Please someone should help me solve it 2x ÷ x^ - 4

Mathematics
1 answer:
Vaselesa [24]3 years ago
3 0

Answer:

The answer is

<h2>{2x}^{5}</h2>

Step-by-step explanation:

<h3>\frac{2x}{ {x}^{ - 4} }</h3>

First of all separate the two from the x

That's

<h3>\frac{2(x)}{ {x}^{ - 4} }</h3>

Next we use the rules of indices

Since they have the same base and are dividing we subtract the exponents

That's

<h3>\frac{ {a}^{x} }{ {a}^{y} }  =  {a}^{x - y}</h3>

So we have

<h3>\frac{2(x)}{ {x}^{ - 4} }  = 2( {x}^{1 -  - 4)}  = 2( {x}^{1 + 4} )</h3>

We have the final answer as

<h3>{2x}^{5}</h3>

Hope this helps you

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Chloe spent $69 and now has no money left. She had before her purchase. She had $ before her purchase. can you please help me wi
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Answer:

$69

Step-by-step explanation:

Given

Purchase = \$69

Amount\ Left = \$0

Required

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To get the her amount before the purchase, we simply add both given parameters together.

This is done as follows;

Amount = Amount Left + Purchase

Substitute 0 for Amount Left and 60 for Purchase

Amount = \$0 + \$69

Amount = \$69

<em>Hence, she had $69 before the purchase</em>

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Solve simultaneous equations 3x-2y=17 +2x-2y=10
Zarrin [17]

Answer:

(7;2)

Step-by-step explanation:

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Question 1
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Answer:

The teacher randomly divides the class into two groups. One of the groups receives computer-based instruction and the other group receives traditional instruction without computers. After instruction, each student takes a test and the teacher wants to compare the test scores of the two groups.

Step-by-step explanation:

A two sample t-test is used to compared the means of two samples who were exposed to different scenarios and therefore, it helps us to see the difference between these two samples.

In this problem, the teacher is experimenting with a new computer-based instruction. To be able to use the two-sample t-test she would have to have two randomly assigned samples and expose each of these two samples to different scenarios (one would receive a traditional instruction and the other one would receive a computer instruction), and finally she would need to compare the scores in both samples.

Therefore, the correct answer would be b) The teacher randomly divides the class into two groups. One of the groups receives computer-based instruction and the other group receives traditional instruction without computers. After instruction, each student takes a test and the teacher wants to compare the test scores of the two groups.

<u>*Option A is incorrect</u> because the students are only exposed to the lesson using a computer program and therefore they aren't exposed to different scenarios.

<u>*Option C is incorrect</u> because although in this case the teacher uses both traditional and computer methods, there are not two different samples and she only gets the opinion of the students which is not an exact method of getting information on the effectiveness of the computer based method.

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