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# Word Problem Help

Alpine's street sweeper cleans downtown in 60 hrs. A newer model cleans in 20 hrs. Together, how long to sweep the streets?

# Rational Expressions addition and subtraction

(4/x+1)+(1/x^2-x+1)-(12/x^3+1)

__9x+1__  _  __6x-2__   X+1.             X+1

# rational expressions without a common denominator

2/x + 2/3=1 first i have to get a common denominator,yes? which would be 3x...so its 6/3x+2x/3x=1now i am lost

# rational expression , need to show the domain the excluded value,set , the factor and the real numbers

x²–36   3x   7w-2 16w2-1

# What is the LCD of 1/10x^4 and 4/5x

This question comes from ch.7.3 titled :Adding and subtracting rational Expressions with the same denominator and least common denominator.

# solving rational inequalities with a sign chart

Hi, i have 2 application questions about rational inequalities that i hope you will help me solve and explain to me how are they solved: 1)When successful new software is first introduced,...

# How do you simplify (2x-5)/(x-2)+(x-8)/(x+4)

I've multiplied it out so that they both have a common denominator of (x+4)(x-2) and now I'm confused on what to do next.

# How to simplify ((4b^2c)^3/20(ab)^2)x((5a^5c)/(18bc^6)

I'be tried this problem several times and keep getting stuck. I don't think I'm starting it right.

# Rationalize the denominator in the expression

Rationalize the denominator in the expression             -√2d   t =     ----            ...

# rational expressions g^2-6g-55 / gk^3 +k / k^2 + k-42

need to find the domain for both expressions   g^2 - 6g-55 divided by g   k^3 + k divided by K^2 + k - 42

# adding and subtracting rational expressions

I need help with adding and subtracting rational expressions

# Rational Expression and Equations ,Functions

Simplify this rational expression    x^2+3x-7    x^2+5x-9       x^2-6x+14 ----------- - ------------- + --------------- x^2-2x-8...

# How do you add rational expressions with different denominators and numerators?

The problem is : (3x+3/x^2+2x+1)+(x-1/x^2-1) ^2=squared ive been on a lot of math help websites but I cant seem to figure out how to solve this

# (FIRST PART ALREADY ANSWERED AND NEW PART ADDED) Why do you find the domain of both the numerator and denominator in a rational equation? When do you do it?

For example, if you had:   x-3 ------ 5x+3   you'd only find the domain and use the denominator. Why wouldn't you also do the numerator?    And...

# can you help me with my math?

determine value of k when g(x)= 4x+k does not intersect the parabola f(x)=-3x2-x+4

# I need help solving rational equations, i cant figure out how

The problem is (2x+1/3)-(x-5/4)=1/2

# one number is 1/4 of another number. The sum of the two number's is 30. Find the two numbers.

I have a few questions on my pre - test study guide that is due  tomorrow that I don't understand how to do. I am in math 120 or in algebra 2 for high school - but i am a college student. I have...

# 1/x + 1/9 / 1xsquare - 1/3

1/x + 1/9 / 1xsquare - 1/3