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mina [271]
3 years ago
7

Find 4,290 + 3,602. Explain how to use mental math to solve.

Mathematics
1 answer:
lina2011 [118]3 years ago
4 0
Answer: 7892

explanation: add each number individually left to right. 4+3 , 2+6 , 9+0 , 0+2
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A study finds that out of every babies born in the​ world, have some kind of major birth defect. What is the simplest way to ass
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A study finds that out of every 400 babies born in the​ world, 28 have some kind of major birth defect. The simplest way to assign random numbers to conduct a simulation based on this​ statistic is to use 00-06 (7%) to indicate the babies with birth defects.

<h3>What is the rationale for the above?</h3>

Note that the total number of births is: 400

Total number of defective babies = 28

Hence, the fraction or ratio of this is:

28/400

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= 7%.

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2 years ago
Is it possible to add to negative numbers and get a positive? give reasons for your response
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3 years ago
X^2+2x+1 is a perfect square trinomial <br><br> True of False?
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Answer:

True.

Step-by-step explanation:

It is because it is in the form a^2x^2+2abx+b^2 and this equals (ax+b)^2.

Why it is in that form:  well comparing  a^2x^2+2abx+b^2, we have a=1, b=1. Testing, plug in those values:

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Test if you like:

(x+1)^2

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Use foil to expand:

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Inner: 1(x)=x

Last: 1(1)=1

---------------Add together

x^2+2x+1

It does indeed equal.

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2 years ago
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