If 3x−y=12, what is the value of 8x2y?

a) 212
b) 44
c) 82
d) the value cannot be determined from the information given.

systems of linear equation

Step-by-step explanation:

(Is obviously A 212)

One approach is to express

8x2y

so that the numerator and denominator are expressed with the same base. Since 2 and 8 are both powers of 2, substituting

23

for 8 in the numerator of

8x2y gives(23)x2y

which can be rewritten

23x2y

Since the numerator and denominator of have a common base, this expression can be rewritten as 2(3x−y). In the question, it states that

3x−y=12, so one can substitute 12 for the exponent,

3x−Y, which means that

8x2=212

Step-by-step explanation: Ez

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