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NISA [10]
3 years ago
9

(4x5 + 7x4 + 36x + 63) = (4x + 7)

Mathematics
1 answer:
Nana76 [90]3 years ago
3 0

Answer:

x = -1.75 , +/- 1.1892i.

Step-by-step explanation:

4x5 + 7x4 + 36x + 63) = (4x + 7)

4x^5 + 7x^4 + 32x + 56 = 0

x^4(4x + 7) + 8(4x + 7) = 0

(x^4 + 8) = 0 or 4x + 7 = 0

4x + 7 = 0  

x = -1.75.

4x^4 = -8

x^4 = -2

x = +/- ⁴√-2

x = +/- 1.1892 i.

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Step-by-step explanation:

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3 years ago
Two years ago, Sally had 5,000 dogs in her dog shelter. Now she has 24,575 dogs. What is the
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Two years ago, Sally had 5,000 dogs in her dog shelter. Now she has 24,575 dogs. The rate of change is 391.5 % increase

<em><u>Solution:</u></em>

Given that Two years ago, Sally had 5,000 dogs in her dog shelter

Now she has 24,575 dogs

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A rate of change is a rate that describes how one quantity changes in relation to another quantity

<h3><u>Steps to follow:</u></h3>
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\text {rate of change }=\frac{\text { new value }-\text {original value}}{\text {original value}} \times 100

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Mrs Lim bought a number of plates at an average price of $6. She decided to buy another plate which cost $18. The average price
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