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Setler [38]
3 years ago
11

Jake a plane and a 5 foot tree after one year he measured and found the tree had a grown by 20% of its original height how tall

is the tree after one year
A. 5.2 ft
b. 6.0‘ft
c. 7.0‘ft
D. 7.5 ft
Mathematics
1 answer:
Licemer1 [7]3 years ago
8 0

Answer:

6.0'ft

Step-by-step explanation:

5 x 1.2 = 6

5 feet is how tall it is initially the 1.2 is the original height plus 20%

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If y varies directly with x and y is 37.4 when x is 17, what is the value of x when y is 13.2?
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Answer:

6

Step-by-step explanation:

We have y ∝ x which is another way of saying y varies directly with x

We can rewrite the direct proportion relation y ∝ x as y = k.x where k is a constant - the constant of proportionality

So y = kx or x = y/k

using y and x values know, we can solve for k and then solve for any x given y

We have

y = 37.4 =  k (17)

Therefore k = (37.4/17) = 2.2

To find x given y = 13.2, use the second equation
x = y/k = 13.2 / 2.2 =  6

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