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2 years ago

Need alot of help please

Mathematics

1 answer:

Radda [10]2 years ago

3 0

Answer:

a) linear

b) nonlinear

c) nonlinear

d) nonlinear

Step-by-step explanation:

For a linear equation the highest degree is 1. If the degree is more than 1, then it is a non-linear equation.

a) 7x=y-4 is a linear equation because the highest degree is one

$\frac{7}{x} + 3y = 9$

is not a linear equation because when we multiply through by x, we get

$7 + 3xy = 9y$

The degree is 2

c) 6xy +3x=2 is non linear because the degree is 2.

d) x=2y³ +y is non-linear be because the degree is 3.

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The pipe fitting industry had 546.5 thousand jobs in 2015 and is expected to decline at an average rate of 3 thousand jobs per y

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Answer:

The amount of jobs from fitting industry shall decline in 5.5 percent from 2015 to 2025.

Step-by-step explanation:

Due to the assumption of a yearly average rate, a linear function model shall be used. The expected amount of jobs ( $n$ ) after a certain amount of years (t) is given by the following formula:

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$\frac{\Delta n}{\Delta t}$ - Average yearly rate, measured in thousands per year. (A decline is indicated by a negative sign)

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$n = 546.5+\left(-3\,\frac{1}{year}\right)\cdot (10\,years)$

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The percent change in jobs from pipe fitting industry is calculated as follows:

$\%n = \left(1-\frac{n}{n_{o}}\right)\times 100\,\%$

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$\%n = 5.5\,\%$

The amount of jobs from fitting industry shall decline in 5.5 percent from 2015 to 2025.

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