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slavikrds [6]
2 years ago
12

If Jackie were to paint her living room alone, it would take seven hours. Her sister Rachel could do the job in nine hours. How

many hours would it take them working together?
Mathematics
1 answer:
Ad libitum [116K]2 years ago
3 0

Answer:

9+8=16

Step-by-step explanation:

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Answer:

A. -1≤x≤6

Step-by-step explanation:

  • 6≥ x² - 5x
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Sergio039 [100]

Answer:

C

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3 years ago
The sum of five different positive integers is 320. The sum of the greatest three integers in this set is 283. The sum of the gr
Nina [5.8K]

Answer:

17

Step-by-step explanation:

Let a,b,c,d,x represent the five integers in Ascending order.

Given;

The sum of five different positive integers is 320

a+b+c+d+x = 320 .......1

The sum of the greatest three integers in this set is 283

c+d+x = 283 .....2

The sum of the greatest and least integers is 119

a+x = 119 ......3

For the largest possible value;

From equation 3, if a is as low as 1,

x = 119-1 = 118

x = 118

For the least possible value;

Subtract equation 2 from 1

a+b = 320-283 = 37

We know that a cannot be higher than b, so the highest possible value of a is;

a = 37-b

a = 37- 19 = 37-19

a = 18

Substituting into equation 3

x = 119-18 = 101

Difference;

∆x = 118-101 = 17

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3 years ago
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