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3 years ago

Pls help me it's urgent pls help me!

Mathematics

1 answer:

soldier1979 [14.2K]3 years ago

3 0

Answer:

x/7 - 2 = y

Step-by-step explanation:

To find the inverse of a function, we switch f(x) and x and then solve for f(x). We thus have

x = 7f(x) + 14

subtract 14 from both sides to isolate the f(x) and its coefficient

x - 14 = 7 f(x)

divide both sides by 7 to isolate the f(x)

(x-14)/7 = f(x)

f(x) is synonymous with y here. so we havt

(x-14)/7 = y

This can also be written as

x/7 - 14/7 = y

x/7 - 2 = y

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balandron [24]

If you think about it sqrt of 16 is 4. So for this it'll be 0.04!

8 0

3 years ago

Read 2 more answers

Jim's stride measures $2\frac{1}{2}$ feet, and Jeffrey's stride measures $2\frac{2}{3}$ feet. There are 5280 feet in a mile. If

djyliett [7]

Answer:

$\frac{16}{15}$

Step-by-step explanation:

The number of stride Jim takes to walk a mile is $\frac{5280}{2\frac{1}{2}}=2112$ strides

The number of strides Jeffrey takes to walk a mile is $\frac{5280}{2\frac{2}{3}}=1980$ strides

Hence, ratio of number of strides of Jim to number of strides of Jeffrey is:

$\frac{2112}{1980}=1\frac{1}{15}$

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3 years ago

Which is relatively better: a score of 79on a psychology test or a score of 48on an economics test? scores on the psychology t

igomit [66]

Psychology

z =(48-87)/14 

z = -2.796 
Economics 

z =(52-53)/8 

z = -0.125 

The score of Economics is better.

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3 years ago

The revenue equation (in hundreds of millions of dollars) for barley production in a certain country is approximated by R(x) = 0

STatiana [176]

Answer:

The marginal-revenue equation is $R'(x)=0.1226x+1.1584$ .

The marginal revenue for the production of 200,000,000 bushels is $R'(x)=1.4036$ .

The marginal revenue for the production of 650,000,000 bushels is $R'(x)=9.1274$ .

Step-by-step explanation:

The derivative $R'(x)$ of the revenue function is called the marginal revenue function and is the rate of change of revenue with respect to the number of units sold.

We know the revenue function, $R(x) = 0.0613x^{2} +1.1584x+2.4813$ . Therefore, the marginal revenue function is

$R'(x)=\frac{d}{dx}R(x) = \frac{d}{dx}(0.0613x^{2} +1.1584x+2.4813)\\\\=\frac{d}{dx}\left(0.0613x^2\right)+\frac{d}{dx}\left(1.1584x\right)+\frac{d}{dx}\left(2.4813\right)\\\\R'(x)=0.1226x+1.1584$