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3 years ago

(6x^3-x^4+7)+(7x^4-3+2x^2

Mathematics

1 answer:

Mama L [17]3 years ago

5 0

Answer:

6x⁴ + 6x³ + 2x² + 4

General Formulas and Concepts:

Algebra I

Combining Like Terms

Step-by-step explanation:

Step 1: Define

(6x³ - x⁴ + 7) + (7x⁴ - 3 + 2x²)

Step 2: Simplify

Combine like terms (x⁴): 6x⁴ + 6x³ + 2x² + 7 - 3
Combine like terms (Z): 6x⁴ + 6x³ + 2x² + 4

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3 years ago

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nlexa [21]

Answer:

19 days

Step-by-step explanation:

Given

$a = 150$ --- initial

$r = 8\%$ -- rate

Required

Days when the fish gets to 30

The function is exponential and as such it follows;

$y = ab^x$

Where x represents the number of days and y the number of fishes

Because the fishes decreases;

$b = 1 - r$

So, we have:

$b = 1 - 8\%$

Express as decimal

$b = 1 - 0.08$

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$y = 30$

$b = 0.92$

So, we have:

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Take log of both sides

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Apply law of logarithm

$log(0.2) = x\ log(0.92)$

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