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azamat
3 years ago
15

2. Given f(x)=2x-7 and g(x)=x - 5, find the values of each expression below.

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
4 0
A) f(5)=3
b)g(5)=0
c)f(-3)=-13
d)5=2x-7 x=6
e)3=x-5 x=8
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Remark

Watch out for the -4<=x<=6 thing. It causes lot's of problems if you are not careful.


Solution.

The second best answer is A and if that restriction, -4<=x<=6, wasn't there, the answer would be A.


When y = - 4, the x value falls outside the restricted domain ( -4<=x<=6) we have been given. so B is not the answer.


When x = - 4 you have to read straight down to see what the y value is. It is - 2. So this is your answer. Only exactly what is the answer. They ask for the minimum value and that is a y value in this case.

So the answer is C <<<<< Answer.


When y = 1 , x = - 2 1/2. That is within the domain, but it is not the minimum value so D is wrong.

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4 years ago
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