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dlinn [17]
3 years ago
12

– Jack can paint a room in 9 hours alone. If Sara helps, they can do the job in 5 hours. How long

Mathematics
1 answer:
Dafna11 [192]3 years ago
8 0

Answer: 9

Step-by-step explanation:

If Jack can paint the room in 9 hours by his self she can only do the same

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PLZ HELP ITS DUE TODAY!!!!
coldgirl [10]

Answer:

2.69827 × 10⁹

Step-by-step explanation:

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7 0
2 years ago
Need Help...
Rudik [331]
<span>|7x-7|+3 = 4x+1  ⇒⇒⇒ add (-3) to both sides
</span>
<span>∴ |7x-7| = 4x - 2
</span>
According to the absolute rule
∴ 7x - 7 = 4x - 2    OR    -(7x - 7) = 4x - 2                                 
    7x - 4x = 7 - 2      l     7x - 7 = -4x + 2                              
   3x = 5                   l     7x + 4x = 2 + 7                                         
  x = 5/3                   l     11 x = 9  ⇒⇒⇒  x = 9/11

∴ x = 5/3  and  9/11


So, the correct answer is option <span>B. 5/3 and 9/11</span>


5 0
3 years ago
Multiplicative inverse of 3/7 x 2/7
Ahat [919]

<h3>\frac{ - 7}{3}  \times  \frac{ - 7}{2}</h3>
  • It is the multiplicative inverse of 3/7 × 2/7
6 0
3 years ago
Read 2 more answers
2. what is the value of x? Show your work
Mademuasel [1]

Write a full questions to understand. You have wrote half questions only

7 0
1 year ago
Help please ..........​
olganol [36]

Answer:

7.  combination; 25C6 = 177100

8.  combination; 15C5 = 3003

Step-by-step explanation:

7. The order of the committee member selections is not important. (It would be if specific people filled specific positions on the committee.) Hence, the number is a number of combinations of 25 people taken 6 at a time.

__

8. The order of players is not important, as it might be if specific choices filled specific positions on the team. (The problem statement gives no indication that is the case. It is only by our knowledge of basketball teams that we entertain the possibility that order might be important.) Hence, the number is a number of combinations of 15 people taken 5 at a time.

_____

Of course, nCk = n!/(k!(n-k)!)

7 0
3 years ago
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