The sum and difference of two numbers are 7.75 and 2.25 respectively . then their product is ?
Answers
Answered by
2
x + y = 7.75 →(1)
x - y = 2.25 →(2)
Add (1) & (2)
2x = 10
x= 5
y = 2.25
xy = 5 * 2.25
= 12.25
x - y = 2.25 →(2)
Add (1) & (2)
2x = 10
x= 5
y = 2.25
xy = 5 * 2.25
= 12.25
debapriyas0000:
answer must be 13.75 , check once again
xy = 5×2.75=13.75
check your solution
yes u r right
there is a mistake by me
hmm
Answered by
1
Your answer is ---
Let the number be x and y and x > y .
according to question
x + y = 7.75 .....(1)
x - y = 2.25 ......(2)
adding equation (1) & (2) , we get
2x = 10
=> x = 10/2
=> x = 5
put this value in equation (1) , we get
5 + y = 7.75
=> y = 7.75 - 5
=> y = 2.75
Therefore , their product is
x*y = 5 × 2.75
=> x*y = 13.75
Let the number be x and y and x > y .
according to question
x + y = 7.75 .....(1)
x - y = 2.25 ......(2)
adding equation (1) & (2) , we get
2x = 10
=> x = 10/2
=> x = 5
put this value in equation (1) , we get
5 + y = 7.75
=> y = 7.75 - 5
=> y = 2.75
Therefore , their product is
x*y = 5 × 2.75
=> x*y = 13.75
answer must be 13.75 . check once again
5×2.25 ≠ 13.75
5×2.75=13.75
any way thank you, :)
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