# Intermediate Algebra

posted by .

Please help with the below. I know the answer I need help figuring out how to get the answer I am obviously doing something wrong, because I come up with a different answer that what I am supposed to. Here it is: F(X)3Xsquared-5X+1 The correct answer is 12Xsquared-70X+101, the answer I come up with is 12Xsquared-65X+76. This is a composition AKA substitution problem. Here are my notes: F(X)3Xsquared-5X+1
g(X)2X-5
(Fog)(X)F(g(x))
3 (2X-5)-5X+1
6X-15-5X+1
2(3Xsquared-5X+1)-5
6Xsquared-10X+2-5
6Xsquared-10X-3

• Intermediate Algebra -

f(x) = 3x^2-5x+1
g(x) = 2x-5

(fog)(x) = f(g) = 3g^2-5g+1
= 3(2x-5)^2 - 5(2x-5) + 1
= 3(4x^2-20x+25) - 5(2x-5) + 1
= 12x^2-60x+75-10x+25+1
= 12x^2-70x+101

Looks like you messed up on the -5(2x-5) part

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### algebra

Solve for s in this equation. Depreciation. D=C-s/n This is my answer D-C=C-s/n-c D-C=-s/n -n(D-C)=-s/n*(-n) -nD+nC=s s=n(C-D) Please chack to see if this is correct Looks fine to me. A slightly shorter (by 2 lines) rearragement is: …
2. ### Algebra

I've been trying to figure out this equation for over an hour but all the answers I get are wrong. The equation is 0.9=-10I^2+6I . The answer is supposed to be 0.3 and it does work out, but I have tried all different ways to solve …
3. ### General

Please understand that I am not upset with anyone or whatever I just want to know something. I have some work to be checked and the regular tutors here say that "we will be happy to critque your thinking" right?
4. ### 8th Grade Algebra-Radicals:Answer Check

Write each expression in simplest form. ( means square root 4. 3(11 + 4(11 Answer: 8(11 7. 7(2 - 2(8 Answer: 1(2 ?
5. ### 8th Grade Algebra: Answer Check

Find the length of the 3rd side of each right triangle. 1. 8^2+15^2=c^2 Answer: c=17 2. 5^2+b^2=13^2 Answer: b=12 3. 9^2+13^2=c^2 Answer: c~15.81 Simplify. Assume that all variables are nonnegative. { this means square root 4. {12 …
6. ### 8th Grade Algebra: Answer Check #2

Add or Subtract (Radicals) { this means squared 1.3{2 + 4{2 Answer: 7{2 2. 8{3 + 3{3 Answer: 11{3 3. 7{5 - 3{5 Answer: 4{5 4. 8{2 - 5{2 Answer: 3{2 5. 6{x + 7{x Answer: 13{x 6. 9{y + 3{y Answer: 12{y Multiply 7. -3x^2(4x^2-3x-5) Answer: …
7. ### Algebra

There is a table of values for the function f. They read: x=3, f(x)=4 x=4 f(x)=5 x=5 f(x)=6 x=6 f(x)=3 x=7 f(x)=5 x=8 f(x)=7 What is the value of 2f(5)-f(4)?
8. ### Biology

- "problems that result as blood alcohol concentration increases" Basically, I'm supposed to put what page number the answer is on, and then what the answer is. I have the page number, yet the answer is no where on the page to be found. …
9. ### Algebra

Hiya. I have 7 expressions that I have been asked to simplify. I worked all of them out, and if you could, I'd like you to check my work for me. Here they are: 1. (x^2 + 3x - 9) + (-4x^2 + 2x - 3) My answer: -4x^4 + 5x - 12 2. (x - …
10. ### Pre- Algebra

Please answer as soon as you can I need help figuring this out :) Which number is greater than 5.5 x 10^-7 and less than 5.5 x 10^7?

More Similar Questions