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Ksenya-84 [330]
3 years ago
11

Y is inversely proportional to x . When y = 3 , x = 20 Work out x when y = 12

Mathematics
1 answer:
Talja [164]3 years ago
5 0

Answer:

x = 5 when y = 12

Step-by-step explanation:

If y is inversely proportional to x, we can say that x1 : x2 = y2 : y1

The order of y2 and y1 respectively are interchanged as y is inversely proportional to x

Now let us simply substitute our known values, and solve for x2;

x1 : x2 = y2 : y1

20 : x2 = 12 : 3

20/x2 = 12/3

12(x2) = 3(20)

12(x2) = 60

x2 = 60/12 = 5

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enot [183]
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a^2 + b^2 = c^2
4^2 + 3^3 = c^2
16 + 9 = c^2
25 = c^2
5 = c
you now know that both of the diagonals have a length of 5.
by counting the units on the two straight, you know that their length is 6.
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Two similar rectangles have a scale factor of 3:2 the perimeter of the small rectangle is 50 feet.What is the perimeter of the l
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Step-by-step explanation:

From the question, we are informed that two similar rectangles have a scale factor of 3:2 and that the perimeter of the small rectangle is 50 feet.

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What does the width of a sphere mean? Given the width of a sphere, How do you find the volume?​
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Step-by-step explanation:

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3 years ago
In a scalene triangle , the perimeter is 33, and the length of one side is 15, and the difference between the two other sides is
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Step-by-step explanation:

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3 years ago
Lincoln middle school plans to collect more than 2,000 cans of food in a food drive. So far, 668 cans have been collected. WRITE
AURORKA [14]
Let x be the unknown number.

7x + 668 < 2000     => 7x plus 668 is less than 2000

where:
7x => x represents the number of cans to be collected in 7 days
668 is the number of cans already collected.
2000 is the target number of cans.

7x  +  668    <    2000
 <u>       - 668           -668</u>
7x                <   1332
<u>÷7                        ÷7</u>
x                  <    190.30
or
x < 190

To check:

7x + 668 < 2000
7(190) + 668 < 2000
1330 + 668 < 2000
1998 < 2000
8 0
3 years ago
Read 2 more answers
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