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Sliva [168]
3 years ago
9

if the sum of two numbers is four and the sum of their squares minus three times their product is 76, find the numbers

Mathematics
1 answer:
Sauron [17]3 years ago
6 0

Answer:

Numbers =(6,-2 )

Step-by step explanation:

Given

the sum of two numbers is four and the sum of their squares minus three times their product is 76,

Let the first term =X

Second term will be=4-x

So

X^2+(4-x)^2-3x(4-x)=76

x^2+16+x^2-8x-12x+3x^2=76

5x^2-20x+16=76

5x^2-20x-60=0

5(x^2-4x-12)=0

So x^2-4x-12=0

x^2-(6-2)x-12=0

x^2-6x+2x-12=0

X(x-6)+2(x-6)=0

(X-6)(X+2)=0

X=6,-2

Let X=6 and -2 then numbers will be 6 and (4-6)=-2

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Answer:

120

Step-by-step explanation:

so

<h2 /><h2><em><u> ?????</u></em></h2>

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for the first place you have 5 choices(2, 3, 4, 5, 6)

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you multiply this choices

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4 0
2 years ago
In a 5% sale, the price of a phone is reduced by £19.4 Find the original price of the phone
gulaghasi [49]

Answer:

The original price of the phone is £388.

Step-by-step explanation:

Since 5% of the price of the phone is reduced, you can simply multiply the reduced number which is £19.4 by 20.  Your final answer should be £388 when you put it on a calculator or do it on a piece of paper.

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2 years ago
Suppose there are two types of persons: high-ability and low-ability. A particular diploma costs a high-ability person $10,000 a
tekilochka [14]

Answer:

K must be in range <u>$45000 ≤ k ≤ $53000 </u>to make this an effective screening device.

Step-by-step explanation:

In order for the screening device to be effective, the range of k must be such that, it is more than the pay of a worker without diploma. The extra amount must at least be equal to the cost of diploma

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8 0
3 years ago
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Sveta_85 [38]

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Step-by-step explanation:

5 0
2 years ago
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Answer:

Neither

Step-by-step explanation:

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2 years ago
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