John had 2⁄3 of his homework complete, Sarah had 5⁄10, Alex 7⁄8, and Michelle 1⁄2. Who completed the most of the homework assign
1 answer:
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(-∞,-4.196)∪(-4.196,-3)∪(-3,-1)∪(-1,0)∪(0,∞)
The solution of the system of equation is the intersection point of the two quadratic equations, so we need to equate both equations, that is,
So, by moving the term -3x^3+20 to the left hand side, we have
Then, in order to solve this equation, we can apply the quadratic formula
In our case, a=5, b=-3 and c=-30. So we get
which gives
By substituting these points into one of the functions, we have
and
Then, by rounding these numbers to the nearest tenth, we have the following points:
Therefore, the answer is the last option