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Klio2033 [76]
3 years ago
12

If y varies directly as x and y = 9 when x = –3, find y when x = 40.

Mathematics
1 answer:
DedPeter [7]3 years ago
8 0

Answer:

y = -120

Step-by-step explanation:

Direct variation is

y = kx where k is a constant

9 = k(-3)

Divide each side by -3

9/-3 = k

-3 = k

y = -3x

Let x = 40

y = -3(40)

y = -120

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The larger number is 18 more than twice the smaller. If the sum of the two numbers is 93, find both numbers
Ganezh [65]

Answer:

larger number=18+(2x)

smaller number=x

(18+2x)+x=93

18 +3x=93

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3x=75

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18+50

68

larger number =68

smaller number=25

6 0
3 years ago
A town has a population of 13,000 and grows at 5% every year what will the population be after 11 years to the nearest whole num
scoray [572]
This question is based on the concept of
amount of interest. Therefore, 22,234 would be
the population after 11 years, to the nearest
whole number.
Given:
A town has a population of 13000 and grows at
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We need to determined the population after 11
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We know that,
Formula =A = P(1+ r)
Where, p be the population. r is the rate and t is
the time.
P= 13000,
r= 5%
†= 11
Now put all these values in formula.
We get,
5
A = 13000(1 +
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= 13000(1 + 0.05)11
A
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5 0
2 years ago
The perimeter of a quarter circle is 14.28 KM. What is the quarter circle's radius?
lawyer [7]
Circumference= 2πr
Circumference= perimeter

14.28km= 2(3.14)r
14.28= 6.2831853072r
divide both sides by 6.2831853072
2.27= r

ANSWER: The radius is 2.27km

Hope this helps! :)
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3 years ago
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BaLLatris [955]

Answer:

Step-by-step explanation:

7 0
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