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Karolina [17]
3 years ago
10

it takes ahmed 20 hours to rake the front lawn while his brother, jeff, can rake the lawn in 16 hours. how long will it take the

m to rake the lawn working together
Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
7 0

Answer:

36 hours

Step-by-step explanation:

20+16= 36

0+6=6

10+20=30

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Express this to single logarithm
zzz [600]

Answer:  \log_{2}\left(\frac{q^2\sqrt{m}}{n^3}\right)

We have something in the form log(x/y) where x = q^2*sqrt(m) and y = n^3. The log is base 2.

===========================================================

Explanation:

It seems strange how the first two logs you wrote are base 2, but the third one is not. I'll assume that you meant to say it's also base 2. Because base 2 is fundamental to computing, logs of this nature are often referred to as binary logarithms.

I'm going to use these three log rules, which apply to any base.

  1. log(A) + log(B) = log(A*B)
  2. log(A) - log(B) = log(A/B)
  3. B*log(A) = log(A^B)

From there, we can then say the following:

\frac{1}{2}\log_{2}\left(m\right)-3\log_{2}\left(n\right)+2\log_{2}\left(q\right)\\\\\log_{2}\left(m^{1/2}\right)-\log_{2}\left(n^3\right)+\log_{2}\left(q^2\right) \ \text{ .... use log rule 3}\\\\\log_{2}\left(\sqrt{m}\right)+\log_{2}\left(q^2\right)-\log_{2}\left(n^3\right)\\\\\log_{2}\left(\sqrt{m}*q^2\right)-\log_{2}\left(n^3\right) \ \text{ .... use log rule 1}\\\\\log_{2}\left(\frac{q^2\sqrt{m}}{n^3}\right) \ \text{ .... use log rule 2}

8 0
3 years ago
-4^2-17
Irina18 [472]

Answer:

Step-by-step explanation:

-4 is really  -1 * 4

-4² = -1 * 4²

-4² = -1 * 16

-4² = -16

Use parenthesis  to square

(-1 * 4)² = (-4)²

(-4)² = 16

5 0
3 years ago
Are two equilateral triangles always similar
sukhopar [10]
Yes because all equilateral triangles have equal angles and side lengths so they are all similar. hope i helped -J

4 0
3 years ago
What is the answer to this?<br> -6+13=
Ket [755]

Answer: -6+13=7

Step-by-step explanation:

3 0
3 years ago
Which matrix translates the vector 〈4,-3〉 to 〈6,-8〉?
Mars2501 [29]

Answer:

2, -5

Step-by-step explanation:

3 0
3 years ago
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