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serg [7]
3 years ago
15

Two bricklayers, Sam and Joe, are working on your house. Sam can complete the work in 5 hours, while Joe can complete the work i

n 3 hours. How many hours does the bricklaying take if they work together? fifteen eighths fifteen ninths six eighths four thirds
Mathematics
2 answers:
Dovator [93]3 years ago
7 0

 Your equation is 1/5 + 1/3 =1/x To solve you have to find the common denominator which is 15 So (1/5)3 and (1/3)5

                                          = 3/15+5/15=8/15

                                                  8/15=1/x now cross multiply

                                                   =15/8

This is the answer I got.

                                                 

                         

            

Lera25 [3.4K]3 years ago
3 0
☺☺☺☺☺☺☺☺☺Can You Explain Why There Are "Fifteen Eights , Fifteen ninths and six eights and four thirds pls or take a picture
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I believe it's D.

Step-by-step explanation:

Because, if you square both the numerator and denominator, the 25 will be 5 and the 36 will be 6.

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The answer to the question

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Help please!!! really really important​
Serga [27]

Answer:

42. Graph a

43. Not possible.

44. Graph e

45. Graph c

46. Graph b.

Step-by-step explanation:

42. 7x + 13 ≥ 55

⇒ x ≥ 6

So, it matches graph a.

43. 12x - 8 > 4(3x + 2)

⇒ 12x - 8 > 12x + 8

Hence, d. not possible.

44. \frac{x}{- 4} - 3 < - 1

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Hence, graph e matches.

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⇒ 8x - 12 ≤ 5 + 8x

⇒ - 12 ≤ 5

This is true for all values of x, hence that matches graph c.

46. - 4(x + 3) > 8(x + 3)

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Hence, graph b matches the situation. (Answer)

4 0
3 years ago
What is the prime factorization of 81m^2 x^3? A) 9^2 • m^2 • x^3 B) 3^3 • m^2 • x^3 C) 3^3 • m • x D) 3^4 • m^2 • x^3
Diano4ka-milaya [45]

81m^2x^3=3^4\cdot m^2\cdot x^3\to\boxed{D.}

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