3 years ago

A trencher digs 5m in 4 hours. How long will it take to dig 30m

Mathematics

1 answer:

attashe74 [19]3 years ago

6 0

Answer:

24 hours, in other words a whole day

Step-by-step explanation:

30m / 5m = 6

4hrs x 6 = 24hours

Therefore, to dif 30m it will take 24 hours.

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[Quick Answer Needed] Which of the following shows the extraneous solution to the logarithmic equation?

Nitella [24]

Answer:

Step-by-step explanation:

Given the logarithmic equation

$\log_4x+\log_4(x-3)=\log_4(-7x+21)$

First, notice that

$x>0\\ \\x-3>0\Rightarrow x>3\\ \\-7x+21>0\Rightarrow 7x$

So, there is no possible solutions, all possible solutions will be extraneous.

Solve the equation:

$\log_4x+\log_4(x-3)=\log_4x(x-3),$

then

$\log_4x(x-3)=\log_4(-7x+21)\\ \\x(x-3)=-7x+21\\ \\x^2-3x+7x-21=0\\ \\x^2+4x-21=0\\ \\D=4^2-4\cdot 1\cdot (-21)=16+84=100\\ \\x_{1,2}=\dfrac{-4\pm 10}{2}=-7,\ 3$

Hence, $x=3$ and $x=-7$ are extraneous solutions

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3 years ago

The bus company charges $2.95 per mile for each bus. What is the cost for all 6 buses to drive 124 mile trip?

Softa [21]

Answer:

2194.8

First, 124 times 2.95 then you get 365.8 and finally you multiply by 6 and get you answer.

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3 years ago

Can someone help me on this I can’t figure out which ones are right.

bearhunter [10]

Answer:

Step-by-step explanation:

the function for this graph is:

$y = {(x - 1)}^{2}$

so the domain (the input AKA THE x values) is all the real numbers.

7 0

3 years ago

I dont know how to solve this does anybody?

postnew [5]

Answer:

3x + 7 + 5

Step-by-step explanation:

I could be wrong... there are 3 x's so that would be 3x, and then the 7 and 5. sorry if i'm wrong

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3 years ago

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A twelve-sided die with sides labeled 1 through 12 will be rolled once. Each number is equally likely to be rolled.

kykrilka [37]

Answer:

1/6

..................

6 0

3 years ago