3 years ago

If three men build a fence in four days,how long would it have taken two men?

Mathematics

1 answer:

vovikov84 [41]3 years ago

4 0

3 men - 4 days |divide 3

1 man - 4/3 day |multiply 2

2 men - 8/3 day

Two men would build this fence in 8/3 day.

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(x 3 +y 3 )(xy 4 +7)

KonstantinChe [14]

Answer:

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3 years ago

Find z if X=27, μ=20, and α=3.4. Round to the nearest hundredth if necessary.

Scrat [10]

Answer:

A. $Z=2.06$

Step-by-step explanation:

We want to find the Z-score of $X=27$ if the population mean is $\mu=20$ ,and the population standard deviation is $\sigma=3.4$ .

We use the formula:

$Z=\frac{X-\mu}{\sigma}$

We substitute the values to obtain:

$Z=\frac{27-20}{3.4}$

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The correct answer is A.

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3 years ago

If g(x)=4x-6 then g^-1(x)=? (1) -4x+6 (2)-1/4x+1/6 (3)1/4x+3/2 (4)1/4x+6

kati45 [8]

Given:

$g(x)=4x-6$

To find:

The function $g^{-1}(x)$ .

Solution:

we have,

$g(x)=4x-6$

Put g(x)=y.

$y=4x-6$

Interchange x and y.

$x=4y-6$

Isolate y.

$x+6=4y$

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$y=\dfrac{x+6}{4}$

Substitute $y=g^{-1}(x)$ .

$g^{-1}(x)=\dfrac{x+6}{4}$

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Therefore, the correct option is (3).

4 0

3 years ago

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Answer:

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Step-by-step explanation:

90/4 is 22.5 a year

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2 years ago

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scoundrel [369]

Answer:

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r=radius of small circle

A1=Area of small circle

A2=Area of big circle

R=9r

A1=50cm^2

A1=pi*r*2

A2=pi*R^2

A2=pi*(9r)^2

A2=81*pi*r^2

A2=81*A1

A2=4050cm^2

Hence the big circle has area of 4050cm^2

Step-by-step explanation:

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3 years ago

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