Which year is the best prediction for when 1206 people will attend graduate school?
1 answer:
Answer:
D year 15
Step-by-step explanation:
Given:
y= 8x^2-40x+6
year is the best prediction for when 1206
Finding value of x for y=1206
8x^2-40x+6= 1206
8x^2-40x+6-1206=0
8x^2-40x-1200=0
Solving the above by quadratic formula:
x=
=
x= 15 and x= -10
As year can not be negative, hence correct answer is
D: year 15!
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The correct option is (B). And
.
Given Equations,
We have to find out Which system of equations is equivalent to the Given system of Equations.
1). System of equation are,
taking - common and transposing to R.H.S we get,
This equation is not equal to equal (2), so the option (1) is not the system of equation equivalent to given Equations.
Similarly, on checking other options,
2. system of equation,
Taking -3 common from L.H.S. we get,
.
Hence the Above system of equation is equivalent to the given system of equation.
So, there is no need to check option (3) and option (4).
Hence the correct option is (B).
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