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WITCHER [35]
3 years ago
6

Which shows the following expression using positive exponents?

Mathematics
1 answer:
8_murik_8 [283]3 years ago
3 0
The negative exponents that are in the numerator pass to positive if the base is moved to the denominator, and the negative exponents that are in the denominator pass to positive if the base is moved to the numerator.

The the answer is the option B: xx^4 / y^2 y^6
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Carl and Bob can demolish a building in 6 days, Anne and Bob can do it in 3, Anne and Carl in 5. How many days does it take all
nata0808 [166]

Answer:

  • 59/20 days or 2.95  days

Step-by-step explanation:

Let Carl do the job in c days, Anne- in a, and Bob in b days

Then the portion of job they can do is 1/c, 1/a and 1/b

<u>As per given we have below equations:</u>

  • 1/c + 1/b= 1/6
  • 1/a + 1/b = 1/3
  • 1/a + 1/c = 1/5

<u>Sum of all 3 equations gives us:</u>

  • 2(1/a + 1/b + 1/c) = 1/6 + 1/3 + 1/5
  • 2(1/a + 1/b + 1/c) = 5/30 + 10/30 + 6/30
  • 2(1/a + 1/b + 1/c) = 21/30
  • 2(1/a + 1/b + 1/c) = 7/10
  • 1/a + 1/b + 1/c = 7/20

It means all three together can complete 7/20 of the job in one day

<u>The rest of the job is done by Anne and Bob:</u>

  • 1 - 7/20 = 13/20

<u>As Anne and Bob can do 1/3 of the job in one day, they need time to complete the rest:</u>

  • 13/20:1/3 = 39/20

<u>Add 1 day to this to find overall time:</u>

  • 1 + 39 /20 = 59/20 days or 2.95  days

4 0
3 years ago
When flipping a coin three times, what is the probability of landing on tails all two times?
xenn [34]
I believe it is A or B
5 0
2 years ago
Read 2 more answers
A man drove his car a distance of 315 miles in 5 hours. If continuing at this rate is possible, he will travel ____ miles in 9 h
bearhunter [10]

Answer:

567 miles

Step-by-step explanation:

we break down how many miles he went in 1 hour

315/5

he went 63 miles in 1 hour

times this by 9 is 567 miles in 9 hours

5 0
3 years ago
Please help!! What is RS?
Reil [10]

Answer:

<h2>         RS = 47</h2>

Step-by-step explanation:

RV=VU and SW=WT    means    VW=\frac{RS+UT}{2}

So:

3x+5=\dfrac{2x+15+6x-37}{2} \\^{\qquad\times2\qquad\qquad\qquad\qquad\times2} \\6x+10=8x-22\\^{\qquad-10\qquad-10}\\6x=8x-32\\^{-8x\qquad-8x}\\-2x=-32\\^{\div(-2)\quad\div(-2)}\\x=16\\\\RS=2x+15=2\times16+15=32+15=47

3 0
2 years ago
2. Find the slope of a line parallel to 3y - 9x = 15<br> M = -3<br> M = 3<br> M = 9<br> M = -6
Wewaii [24]

Answer:

The slope of the parallel is 3 or M = 3 for this question

7 0
2 years ago
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