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andrew11 [14]
2 years ago
9

.

Mathematics
1 answer:
Darina [25.2K]2 years ago
8 0
They are selling for 3grand in the candle company in new your I am correct because rig the new law of Judas
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Three students have started a fence-painting business. Working together, Pragnesh and Qazi can paint the fence in 12 hours. Simi
Mila [183]

Step-by-step explanation:

P and Q can do the whole work in 12 hours.

so, in 1 hour they can do 1/12.

P and R can do in 1 hour 1/15.

Q and R can do in 1 hour 1/20.

mathematically that looks like

P + Q = 1/12

P + R = 1/15

Q + R = 1/20

P + Q + R = 1/x

together they can do 1/x of the work in 1 hour.

it will take them x hours, if all 3 worked together.

from the first equation we get

P = 1/12 - Q

that gives us in the second equation

1/12 - Q + R = 1/15

R = 1/15 - 1/12 + Q = 4/60 - 5/60 + Q = Q - 1/60

but from the 3rd equation we get also

R = 1/20 - Q

so,

Q - 1/60 = 1/20 - Q

2Q = 1/20 + 1/60 = 3/60 + 1/60 = 4/60

Q = 2/60 = 1/30

R = Q - 1/60 = 2/60 - 1/60 = 1/60

P = 1/12 - Q = 1/12 - 2/60 = 5/60 - 2/60 = 3/60 = 1/20

so, we get for the sum :

P + Q + R = 3/60 + 2/60 + 1/60 = 6/60 = 1/10

that means in 1 hour they can do together 1/10 of the work.

so, together they will need 10 hours to paint the fence.

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Jeff finds some bugs. He finds 10 fewer grasshoppers than crickets. He finds 5 fewer crickets than ladybugs. If Jeff finds 5 gra
Svet_ta [14]
Ladybugs: 20
Crickets: 15
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3 years ago
1,828 thousand in standard form
vlabodo [156]

Step-by-step explanation:

1.828 x 10 ^3 is standard for 1828

3 0
3 years ago
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I need three integers to make up 5<br> my integers are -1, -6, 9, 4, -7, -2, 8
satela [25.4K]

Answer:

You can get a negative 5 if you subtract -7 minus -2.

Step-by-step explanation:

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Help due tonight<br> plssss
postnew [5]

Answer:

Perpendicular to base

Step-by-step explanation:

The cut creates two rectangular prisms (each angle must be 90 degrees)

The cut is perpendicular to the base

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3 years ago
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