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two numbers have the sum of 54 and a product of 200. What are the two numbers?
NOTE: this is a word problem, this should be answered in complete solution thank you :)
9 Answers
- ajedrezLv 79 years agoFavorite Answer
x + y = 54
xy = 200
y = 54 - x
x(54 - x) = 200
54x - x^2 = 200
x^2 - 54x + 200 = 0
x = (54 +/- sqrt(2916 - 800)) / 2
x = (54 +/- sqrt(2116)) / 2
x = (54 +/- 46) / 2
x = 4 and x = 50
4 + y = 54
y = 50
50 + y = 54
y = 4
So it's 50 & 4.
I hope this information was very helpful.
- 9 years ago
a + b = 54
a x b = 200
b = 200/a
Combine the equations
a + 200/a = 54
a^2 + 200 = 54a
a^2 - 54a + 200 = 0
(a - 50) (a - 4) = 0
So a must be 50 or 4
a + b = 54
if a is 50 then b is 4
is a is 4 then b is 50
So the numbers are 4 and 50
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- SonyaLv 59 years ago
x+y=54----(1)
x*y=200----(2)
From (1), x=54-y
Then (2) becomes, (54-y)y=200
54y-y^2=200
y^2-54y+200=0
(y-50)(y-4)=0
ie, y=50 or 4
Put these y in (1)
if y=50 then x+50=54==> x=4
if y=4 then x+4=54==> x=50
So the numbers are 50 and 4
- DanielMLv 49 years ago
x + y = 54
xy = 200
solve simultaneously (substitution is the best method here)
You will get, as stated above, 50 and 4.