To pass a course with a B grade, a student must have an average of 80 or greater. A student’s grades on three tests are 73, 86,
and 78. Find what score the student must get on the next test to get a B average or better. What grade must the student get? ___ or greater.
1 answer:
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Answer:
None of the options are correct
Step-by-step explanation:
Given
Required
The roots of the function
Since the function is a quadratic function; to get the roots of the function, f(q) must be equal to 0
becomes
Make the subject of formula
Rearrange
Take square roots of both sides
Expand the square root of 125
q = ±5
Split into 2
or
or
Hence, the roots of the quadratic function are or