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The sum of two numbers is 40 and their difference is 6.5 what is their product

User Walknotes
by
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1 Answer

1 vote
Let x = first number, and y = second number.
x + y = 40 (1)
x - y = 6.5 (2)

Rearrange (2)
y = x - 6.5 (3)

Sub (3) in (1)
x + (x - 6.5) = 40
2x - 6.5 = 40
2x = 33.5
x = 16.75 (4)

Sub (4) in (1)
16.75 + y =40
y = 23.25

x * y = 16.75 * 13.25 = 221.9375

The product is 221.9375







User Matt Hamann
by
7.5k points

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