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alexira [117]
3 years ago
14

A positive number is 30 less than its square. Find the number.

Mathematics
1 answer:
Veronika [31]3 years ago
8 0
<span><span>x = x^2 - 30

or

x^2 - x - 30 = 0
Factors to
(x-6)(x+5) = 0

x = +6 is the positive number</span></span>
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Eva and her children went into a restaurant and where they sell
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3 years ago
The value of y is directly proportional to the value of x. Given y = 12 when x = 36.
Ahat [919]

Answer:

y = 20

Step-by-step explanation:

The problem states that y = 12 when x = 36. 36/12 is 3. This means that y is a third of what x is. This would mean that if x = 60, y would be a third of 60 which is 20 since 60/3 is 20.

5 0
2 years ago
At a sleep over, six friends were talking about the number of hours of sleep they usually get each night. Five of them said: 12,
mr Goodwill [35]

Answer:

So average of a set of values is the sum of given values divided by the number of values

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(12 + 9 + 4 + 8 + 7 + x)/6 = 9

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4 0
3 years ago
Can someone please help me with this
Ne4ueva [31]

Step-by-step explanation:

Therefore, 55+40+z=180

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z+y=180

85+y=180

y=95

5 0
3 years ago
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