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LiRa [457]
3 years ago
12

p varies directly as q and inversely as r. One set of values is p = 5, q = 1, and r = 2. Find p when q = 10 and r = 50.

Mathematics
1 answer:
kari74 [83]3 years ago
6 0
P = kq/r

5 = k*1/2
k = 2*5 = 10

p = 5*10/50 = 1
P is 1.

Hope it helps!
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Answer:

20 m by 10 m

Step-by-step explanation:

let w be width and l be length , then

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l = 30 - w → (1)

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Substitute l = 30 - w into (2)

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30w - w² - 200 = 0 ( multiply through by - 1 )

w² - 30w + 200 = 0 ← in standard form

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Equate each factor to zero and solve for w

w - 10 = 0 ⇒ w = 10

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Substitute these values into (1)

l = 30 - 10 = 20

l = 30 - 20 = 10

dimensions of field is 20 m by 10 m

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