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murzikaleks [220]
3 years ago
5

three postal workers can sort a stack of mail in 30 minutes, 30 minutes, and 60 minutes, respectively. find how long it takes th

em to sort the mail if all three work together.
Mathematics
2 answers:
mote1985 [20]3 years ago
8 0

Answer:

Step-by-step explanation:

t/30+t/30+t/60=1

2t/60+2t/60+t/60=1

5t/60=1

5t=60

t=12 minutes

OverLord2011 [107]3 years ago
5 0

Answer:

it will take about 1/3 of the time (10 minutes)

Step-by-step explanation:

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Given that A varies directly as B and inversely as C and that; A=12 when B=3 and C=2. Find B when A=10 and C=1.5​
Kitty [74]
<h3>Answer:</h3>

1.9

Step-by-step explanation:

<h3>The above is direct and inverse variation.</h3>

A = kB/C -----------(1)

A=12

B = 3

C= 2

substitute A, B and C into equation (1).

12 = K × 3/2

12 = 3k/2

12×2 = 3k

3K = 24

dividing bothsides by 3

3K/3 = 24/3

K = 8

substitute K = 8 into equation (1)

A = 8B /C --------------(2)

Equation (2) is the equation connecting

A,B and C.

Finding B when A = 10 and C = 1.5

10 = 8B / 1.5

10× 1.5 = 8B

15 = 8B

Dividing bothsides by 8 :

B = 15/8

B = 1.875

B = 1. 9 ( approximately)

6 0
2 years ago
A sanitation company charges $4 per bag for garbage pickup plus a $10 weekly fee. A restaurant has 14 bags of g garbage. What wi
soldi70 [24.7K]

Answer:

<h2>$66</h2>

Step-by-step explanation:

Step one:

given data

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$4 per bag

$10 weekly fee

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<em>the linear function for the total per week is</em>

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Step two:

the independent variable is the weekly fee of $10

for x=14

y=4(14)+10

y=56+10

y=$66

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Step-by-step explanation:

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70/13=5.384615

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