It is almost the end of the grading period. I have 730 out of 880 points so far in my math class which means I currently have a
B (83%). There are 90 points remaining before grades come out. My teacher rounds each student's score to the nearest percent. What is the fewest number of points I need to get and end up with a grade of...
C (at least 70%)?_____
B (at least 80%)?_____
A (at least 90%)?_____
Plz help me figure this out
C (at least 70%)?_____
B (at least 80%)?_____
A (at least 90%)?_____
Plz help me figure this out
2 answers:
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Answer:
0
Step-by-step explanation:
Quadratic equation
The discriminant is the part of the quadratic formula within the square root symbol: . The discriminant indicates if there are two solutions, one solution, or none.
The discriminant can be positive, zero or negative which determines how roots exist for the given quadratic equation.
So, a positive discriminant tell us that the quadratic has two different real solutions.
A discriminant of zero tell us that the quadratic has two real and equal solutions.
And a negative discriminant tell us that none of the solutions are real numbers.
In this case: 25x^2-10x+1=0
We can see that
a= 25 b=-10 c=1
Using:
We have
the answer is zero, so the quadratic has two real and equal solutions