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2 years ago

Please help i dont know what this means. Give me a example too.

Mathematics

1 answer:

konstantin123 [22]2 years ago

4 0

Answer:

I assume the other person used goog|e

Anyway here is the answer

First an operation is like an equation 5+5 78/2x^2, something like that

And I just gave examples

Step-by-step explanation:

Epic (8

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Is xy= 60 a direct variation or inverse variation

kirill115 [55]

Answer:

<h2>Inverse variation</h2>

Step-by-step explanation:

Direct variation:

$\dfrac{y}{x}=constant$

Inverse variation:

$xy=constant$

We have

$xy=60$

it's an inverse variation.

4 0

2 years ago

A 45 gram sample of a substance that's used to preserve fruit and vegetables has a k-value of 0.1088

Alekssandra [29.7K]

Answer:

The substance's half-life is 6.4 days

Step-by-step explanation:

Recall that the half life of a substance is given by the time it takes for the substance to reduce to half of its initial amount. So in this case, where they give you the constant k (0.1088) in the exponential form:

$N=N_0\,e^{-k\,*\,t}$

we can replace k by its value, and solve for the time "t" needed for the initial amount $N_0$ to reduce to half of its value ( $N_0/2$ ). Since the unknown resides in the exponent, to solve the equation we need to apply the natural logarithm:

$N=N_0\,e^{-k\,*\,t}\\\frac{N_0}{2} =N_0\,e^{-0.1088\,*\,t}\\\frac{N_0}{2\,*N_0} =e^{-0.1088\,*\,t}\\\frac{1}{2} =e^{-0.1088\,*\,t}\\ln(\frac{1}{2} )=-0.1088\,t\\t=\frac{ln(\frac{1}{2} )}{-0.1088} \\t=6.37\,\,days$

which rounded to the nearest tenth is: 6.4 days

8 0

3 years ago

Read 2 more answers

Find the equation of a line passing through a point (3,5) and perpendicular to the line joining the points (3, 7) and (7, -1)

eduard

Step-by-step explanation:

we start first by finding the gradient of the line

change in y/change in x

7-(-1)/3-7=8/-4

=-2

then for perpendicular lines m1m2=-1

therefore to find the gradient of that line

-2m2=-1

therefore m2=2

so therefore

y-5/x-3=2

so y-5=2x-6

y-2x=-1

in the form y= mx +c

then y=2x-1

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2 years ago

Suzie bought an antique jewelry box for $34.50. It originally cost $8.75 when it was made. Its value has increased $0.75 a year

timama [110]

Answer:

if she would sell it for what it is worth now she would make $36.50

Step-by-step explanation:

0.75 x 83 = 62.5

62.5 + 8.75 = 71

71 is how much it is worth now

71 - 34.5 = 36.5

36.50 is how much she would make

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3 years ago

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MAXImum [283]

Answer:

Step-by-step explanation:

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3 years ago

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