# Algebra II

I have some questions on my assignment, if you don't mind could you look over my answers. thanxs!

Find all the numbers that must be excluded from the domain of the rational expression.

x+8/x^2-16, my answer: x cant be -4 or 4

x-3/x^2+11x+24, my answer: x cant be -3 or -8

Simplify the rational expression. Find all the numbers that must be excluded from the domain of the simplified rational expression.

3x+3/15^2+21x+6 I don't understand this one.

Multiply or divide as indicated.

x^2+13x+42/x^2+x-42 * x^2-49/x^2-x-42 I don't understand this one.

(x+7)^2/x-7 / x^2-49/7x-49 This I am not too sure how to do, I know you have to flip the 2nd fraction.

x^2-2x/x^2+6x + x^2+x/x^2+6x I got x-1/x+6

Express the perimeter of the trapezoid as a single rational expression.

These are the rational expressions that are being used: x+6/x+3, 5/x+3, x+1/x+3, 5/x+3. I know you have to add each of the expressions, when I get to the end of working it out, I get x^2+x+6x+6/x+3, but that's not one of my choices. My choices are: a. 2x+17/x+3, b.4x+17/x+3, c.x+17/x+3, and d. x+14.

Simplify the complex rational expression.

4+2/x / x/4+1/8 This one I don't understand how to do it,

for
"3x+3/15^2+21x+6 I don't understand this one."

First factor it this way:
3(x+1)/[3(x+1)(5x+2)
=1/(5x+2) x cannot be -1 or -2/5

for
"Multiply or divide as indicated.

x^2+13x+42/x^2+x-42 * x^2-49/x^2-x-42 I don't understand this one. "

I wish you had used brackets, I will assume it was like this:
Multiply or divide as indicated.

(x^2+13x+42)/(x^2+x-42) * (x^2-49)/(x^2-x-42)

Everything here factors:
(x+6)(x+7)/[(x+7)(x-6)] * (x+7)(x-7)/[(x-7)(x+6)]
=(x+7)/(x-6)
you calculate the necessary restrictions

for
"(x+7)^2/x-7 / x^2-49/7x-49 This I am not too sure how to do, I know you have to flip the 2nd fraction."

I am guessing it was like this:
(x+7)^2/(x-7) ÷ (x^2-49)/(7x-49)

= (x+7)^2/(x-7) ÷ (x+7)(x-7)/[7(x-7)]
= (x+7)^2/(x-7) * 7(x-7)/[(x+7)(x-7)]
= 7 because everything cancelled

for the trapezoid question, notice that the denominators are all the same, so just add the numerators to get 2x+17 which is part of your first choice.

I am not going to guess what the last question looks like without using brackets
Retype it using brackets

(x^2-2x)/(x^2+6x) + (x^2+x)/(x^2+6x) I got (x-1/x+6)

Simplify the complex rational expression.

(4+2/x) / (x/4+1/8)

Choices are: a.16, b.x/16, c.1, and d.16/x

"(x^2-2x)/(x^2+6x) + (x^2+x)/(x^2+6x) I got (x-1/x+6) "

I got (2x-1)/(x+6), check your numerators

"(4+2/x) / (x/4+1/8) "

common denominator for the top is x,
for the bottom its 8
(4x+2)/x ÷ (2x+1)/8
= (4x+2)/x * 8/(2x+1)
= 16/x

oqyevbxpj eaxfpjhg ecnr xcimp hbpitz vgdfuzw hgqnesw

1. 👍
2. 👎
3. 👁

## Similar Questions

1. ### Math

Richa spends 1/4 of pocket money on chocolates,1/8 on pencils.At the end she had R's 40 left. How much did she have at the beginning? Many solved 25 questions of his math assignment.This was 1/8 of total questions. He does not

2. ### English

Quick questions about vocab, Insidious literally translates to "sitting in," but the word means "secretly working to cause harm." Explain the possible connection between the actual and literal definitions? Also, list as many words

3. ### English

What is the prepositional phrase in the sentence? Put the lasagna in the oven tonight if you don't mind. 1) put the lasagna 2) in the over 3) the oven tonight 4) if you don't mind I think #1

4. ### health

Write a 300-500 word essay on what you have learned. The essay should have an introduction that states your thesis. Representation and style are general concepts to keep in mind when you develop your points. End your assignment

1. ### probability

A jar contains 3 red balls and 2 green balls. You draw one ball at random. Determine the probability of selecting a. red b. green c. blue d. red or green p.s: the reason I am asking this questions is because we never learned about

2. ### World History

I have a set of Photo Analysis Questions which are as follows: 1. Who are the people in the photo and what do they look like? 2. What is the relationship between he different people in the photo? 3. What are the people doing in

3. ### math 20-1

Has anyone on here completed the ADLC Math 20-1 course? if so would you mind giving me answers to the assignment portions of Rational Expressions, absolute values and linear equations?

4. ### overview of teaching techniques

8. Which one of the following guidelines should be followed when giving directions to students? A. Don’t allow students to choose the activity—make all decisions yourself. B. Require students to find their own background

1. ### Sociology

I'm working on my sociology assignment on American Family. I have to answer questions on how today's american family have changed from watching old and current tv shows that my teacher assigned to us. (The 70's show and Gilmore

2. ### Legal Research

Can somebody please help me with his I don't know what to do? While researching a legal issue for your supervising attorney, you stumble across a brand new decision that appears to pertain to your research assignment. The ruling

3. ### Language Arts

Read the two sentences. he completed his assignment. Then he submitted it to his teacher. Which sentence combines the two sentences using a past participle? A. He submitted the completed assignment to his teacher. (no) B. He

4. ### question

My question is inregards to why is it that all of my questions that i've posted up here in this website and the answers that i've received show up when i search on the internet. For example if i go to the website askjeeves and