Posted by **anonymous** on Friday, March 18, 2011 at 12:02pm.

1) For which of the following functions is f(-5) = 2 ? a)f(x) = x +7 b) f(x) = 2x-6 c) f(x) = 3x+5 d) none of these

2) Which of the following is a function? a)(-4,1), (1,8), (-4,2) b)(-4,1), (1,-8), (-2,2) c)(-4,1),(1,-8), (1,2) d) none of these

3) what is the relationship between the lines y=-8x +5 and y =-3x -7 ?

4) evaluate i^14

I think

1- a

2- don't understand

3 -don't understand

4 - -1

can someone veridy & assist me on this ?

- Algebra -
**MathMate**, Sunday, March 20, 2011 at 10:35am
1. correct

4. correct

2.

A function is a relation which relates the elements of two sets (of numbers) such that any element of the first set is related to exactly one element of the second set.

For example:

A={1,2,3}, B={4,5,6}

f: A->B is a function which relates elements of set A to elements of set B.

If we define f by (1,4),(2,6),(3,5), then the relation f is a function, since it satisfies the stipulation that any element in A is related to *exactly* one element in B.

On the other hand,

if we define:

g : A-> B such that

(1,4),(1,6),(2,5),

then g is not a function because element 1 of set A is related to *two* elements of B (4 and 6). So in this case, g is not a function.

3. The two lines are not parallel, so they intersect somewhere in space.

They are not parallel because the slopes are different (8 and -3).

## Answer this Question

## Related Questions

- Check my CALCULUS answers please! - Any short explanation for things I got ...
- Calculus, check my answers, please? :) - Okay, so I think these are right, but I...
- Algebra - Can anyone help me with the following, by providing the steps to get ...
- Algebra - Graph and label the following two functions: f(x)=(x^2+7x+12)/(x+4) g(...
- Algebra - Can anyone help me with this problem? I need to show all steps and ...
- Economics/Algebra - Can someone help with the following: I know how to get the ...
- College Algebra! help! - Consider the following functions f(x)= (7x+8)/(x+3) and...
- Calculus, please check my answers! - 1. Evaluate: lim x->infinity(x^4-7x+9)/(...
- advanced functions/precalculus - 1. The function f(x) = (2x + 3)^7 is the ...
- Calculus help, please! - 1. Evaluate: lim x->infinity(x^4-7x+9)/(4+5x+x^3) 0...

More Related Questions