Answer:
The number D = b2 – 4ac determined from the coefficients of the equation ax2 + bx + c = 0. The discriminant reveals what type of roots the equation has. Note: b2 – 4ac comes from the quadratic formula.
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The cost of next model car is $ 33136.
Step-by-step explanation:
Given,
The cost of current model car is $38000
The next model car is 12.8% less than the current model.
To find the cost of next model
Formula
If the price of object is $x and it decreases r% for next year, the value o the object for next year is = $ x×(100-r)%
So,
The cost of next model = $ 38000×(100-12.8)%
= $ 38000×87.2%
= $ 33136
Rational functions are written as fractions. The expression equivalent to 
is 
<h3>Rational functions</h3>
Given the rational function expressed as:
This can be further expressed as:
Factorize the denominator to have;
Hence the expression equivalent to is
Learn more on rational function here: brainly.com/question/1917026
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The answer is 5a pretty sure
<span>8t-r=12t
Add r to both sides
8t=12t+r
Subtract 12t from both sides so that t can only be on one side
-4t=r
Divide both sides by -4
Final Answer: t= r/-4</span>
