The correct expression is (a) n = 100; (x + 10)^2
<h3>How to determine the value of n?</h3>
The expression is given as:
x^2 + 20x + n
Take the coefficient of x
k = 20
Divide by 2
k/2= 10
Square both sides
(k/2)^2 = 100
The above value represents the value of n
i.e.
n = 100
So, we have:
x^2 + 20x + 100
Expand
x^2 + 10x + 10x + 100
Factorize
x(x + 10) + 10(x + 10)
Factor out x + 10
(x + 10)^2
Hence, the correct expression is (a) n = 100; (x + 10)^2
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Answer:
12
Step-by-step explanation:
If 12 apples makes 2 cups, we can assume that 6 apples make 1 cup.
Take the number of apples and divide it by 6 in order to find out the number of cups that can be made.
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$80 - $20 = $60 left.
Step-by-step explanation:
Answer:
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Step-by-step explanation:
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