tckryoung
28.01.2020 •
Mathematics
Which property is illustrated below?
1 + 7 = 7 + 1
identity property of addition
commutative property of addition
associative property of addition
distributive property
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Ответ:
a+b = b+a
Ответ:
Let the no. of marbles john had be x
Then the no. of marbles jivanti had = (45-x)
The no. of marbles left with john, when he lost 5 marbles = 45-x-5=40 - x
Therefore their product = (x-5)(40-x)
=40x - x2 -200+5x
=x2+45x-200
So,-x2 + 45x-200=124. (given , product =124)
so, x2-45x+324=0
Therefore, the no. of marbles john had , satisfies the quadratic eqn ,
x2-45x+324.
When u will find the value x of this eqn that no. will be the no. of marbles they started with!
Hope it helps
Step-by-step explanation: