Friday

October 24, 2014

October 24, 2014

Posted by **math is pointless** on Wednesday, October 7, 2009 at 6:50pm.

g(x)=-6x+5

please explain how you got the answer

- algebra 2 -
**jim**, Wednesday, October 7, 2009 at 7:38pmAn inverse just undoes what the original function did, so you can get it by doing the opposite of what the original functtion did, in reverse order.

g(x) tells you: multiply by -6, then add 5.

Its inverse will tell you: subtract 5, then divide by -6.

Example: g(2) = 2*-6 + 5 = -7.

Inverse (call it h()):

h(-7) = (-7-5)/-6 = 2

so h(x) is going to look like (x-5)/-6.

Composition means finding h(g(x)); in other words write out g(x) in full instead of x and then apply h(x) to it, and if we're right, the whole mess should come back to be equal to x, where we started.

g(x)=-6x+5

h(g(x)) = ((-6x+5)-5)/-6

Does that get back to plain old x?

**Answer this Question**

**Related Questions**

algebra 2 - for each function, find an equasion for the inverse. then use ...

algebra 2 - for each function, find an equasion for the inverse. then use ...

Algebra - I have to find the inverse function of f(x)=3-4x. I got y=3-x/4 for ...

4th grade - (math) find a rule. writhe the rule as an equasion. use the equasion...

Maths B - (a) What is the inverse of the function y = 3x2 ? (b) On the same set ...

algebra - 1 (a) A function passes through the points (0, -5), (1, 0), (2, 7). ...

math - The cost of producing q articles is given by the function C=f(q)=100+2q...

Algebra - Myra uses an inverse variation function to model the data for the ...

College Algebra - Find the inverse of the function below. Graph the function ...

Calculus - F(x) = 1-x and g(x) = 1/x These functions have the property that f = ...