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professor190 [17]
3 years ago
15

Y is directly proportional to the square root of x

Mathematics
1 answer:
MatroZZZ [7]3 years ago
4 0

Answer:

y = 20

Step-by-step explanation:

Given y is directly proportional to \sqrt{x} , then the equation relating them is

y = k\sqrt{x} ← k is the constant of proportion

To find k use the condition y = 32 when x = 64, then

32 = k\sqrt{64} = 8k ( divide both sides by 8 )

4 = k

y = 4\sqrt{x} ← equation of proportion

When x = 25, then

y = 4\sqrt{25} = 4 × 5 = 20

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D(1) = 13 d(n) = d(n-1) + 17 find the 4th term
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