mary is preparing for her college entrance exams. in a practice test, she answered 12 problems in 30 minutes. at this rate, how
2 answers:
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Answer:
The answer is the option C
graph of minus
, with discontinuity at negative
, negative
Step-by-step explanation:
we have
Simplify
Step 1
Convert to a factored form the numerator
Group terms that contain the same variable, and move the constant to the opposite side of the equation
Complete the square. Remember to balance the equation by adding the same constants to each side.
Rewrite as perfect squares
Square root both sides
so
Step 2
Simplify the function f(x)
The domain of the function f(x) is all real numbers except the number
Because the denominator can not be zero
------> with a discontinuity at
The discontinuity is at point
the answer in the attached figure
