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astraxan [27]
3 years ago
8

The sum of two numbers is 53 and the difference is 27. What are the numbers?

Mathematics
1 answer:
ikadub [295]3 years ago
8 0

Answer:

The numbers are 39 and 14.

Step-by-step explanation:

Equation 1, sum of the numbers:

 

x  +  y   =  53

 

Equation 2, difference of the numbers:

 

x  -  y  = 25

 

System of equations:

 

x  +  y  =  53

x  -  y   =  25

----------------

2x = 78

 

x = 39

 

Solve for y:

 

39  +  y  = 53

 

y  =  14

 

The numbers are 39 and 14.

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Answer:

The minimum value for  f(x) = 0.15(x + 1)^2 - 3 is -3.

Step-by-step explanation:

Given function is f(x) = 0.15(x + 1)^2 - 3

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Now, differentiate f(x) = 0.15(x + 1)^2 - 3  w.r.t x.

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f(-1) = 0.15(-1 + 1)^2 - 3\\f(-1)=-3

Also, f''(x)=0.3 which is positive, We have minimum value.

So, the minimum value for  f(x) = 0.15(x + 1)^2 - 3 is -3.

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Source:
http://www.1728.org/compint3.htm


<span> </span><span><span> </span> </span>

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