Which expression is equivalent to 7(xy) 7x+y 7x-y x(7y) xy/7
2 answers:
Answer:
Step-by-step explanation:
The given expression:
i.e. a product of 7 and xy.
The operation used here: Multiplication.
Commutative property of multiplication :-
for any numbers a and b.
Associative property of multiplication :-
for any numbers a , band c.
Now, [Associative property of multiplication]
[Commutative property of multiplication]
[Associative property of multiplication]
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Given, the rate of growth of St. Augustine grass is cm per week.
We have to find the number of weeks that the grass grow to cm.
Let's take the number of weeks be x.
In 1 week the grass grow = cm
So in x weeks the grass grow = cm
So we can write,
To solve it for x, first we will move 7 to the right side by multiplying it to both sides. We will get,
Now to get we will move 4 to the right side by dividing it to both sides. We will get,
So we have got the required answer.
After 3 weeks the grass grow .