# Algebra 1--Please, help me! (Steve)

1. 3r^2t/6st^3 x 2r^2s^3t^2/8r^4s^2

2. x^2 + x/x^2 + 3x + 2 + 3/x + 2

3. The Escobar family went on a car trip. They drove 100 miles on country roads and 240 miles on the highway. They drove 50% faster on the highway than on the country roads. Let r represent their rate on country roads in miles per hour.

a. Write and simplify an expression that represents the number of hours it took the Escobar family to complete their trip in terms of r.

b. Find their total travel time if they drove the posted speed limit.

1. 👍 0
2. 👎 0
3. 👁 85

1. 👍 0
2. 👎 0
2. by now these should be getting easier. When multiplying/dividing powers, add/subtract the exponents.

3r^2t/6st^3 x 2r^2s^3t^2/8r^4s^2
= (3*2)/(6*8) r^(2+2-4) s^(-1+3-2) t^(-3+1+2)
= 1/8

You gotta start using parentheses...

x^2 + x/x^2 + 3x + 2 + 3/x + 2
= (x^2+x)/(x^2+3x+2) + 3/(x+2)
= x(x+1) / (x+2)(x+1) + 3/(x+2)
= x/(x+2) + 3/(x+2)
= (x+3)/(x+2)

Since time = distance/speed,

h = 100/r + 240/(1.5r)
Now you have to know what the posted speed limits were.

1. 👍 0
2. 👎 0
posted by Steve
3. A jogger on a treadmill is jogging at 5 miles per hour. Which of the following is the time it will take him to job 1 mile?

1. 👍 0
2. 👎 0
4. The posted speed limit is 40mph.

1. 👍 0
2. 👎 0
posted by Jun

## Similar Questions

1. ### Algebra 1--Please, help me!

asked by Victoria on May 27, 2014
2. ### Urgent Math please check

Very Important I can get someone to check these for me... I have to get an A, and I was wondering if someone could double check these for me. I am about 95% sure they are right, but just need a fresh set of eyes. I know I've been

asked by Brittany on April 2, 2011
3. ### Polynomial- Doublecheck2

I asked this earlier, but I didn't get an answer. I'm glad though, because I found a couple of typos. I can get someone to check these for me... I have to get an A, and I was wondering if someone could double check these for me. I

asked by Brittany on April 3, 2011
4. ### Algebra

1. LCM of 15x^7 and 45x^7 2. Marla can shovel the driveway in 60min and Bill can do it in 45min how long would it take them to do the job together? 3. Divide and simplify: x^2-4/x divided by x+2/x+8 4. add and simplify: 5/49z^3 +

asked by Anonymous on November 21, 2010
5. ### Algebra 1

Multiply. Simplify your answer. 1. (n + 3/n- 5) x (n^2 - 5n) A: n^2 + 3n 2. (6xy^2/2x^2y^6) x (6x^4y^4/9x^3) A: 2 3. (3h^3 - 6h/10g^2) x (4g/g^2 - 2g) (There is no typo.) A: ? 4. (m^2 + m - 2/m^2 - 2m - 8) x (m^2 -8 + 16/3m -3)

asked by Victoria on May 30, 2014
6. ### Algebra 1B Radical expressions & data analysis

1. Simplify 2/√5 A. 2/√5 B. √10 C. √10/5 D. 2√10/5 *** My answer 2. Simplify -11√112 A. -44√7 B. -176 √7 C. -27 √7 D. 4√7 *** My answer 3. Simplify 17√17 -9 √17 A. 8 *** My answer B. 8√17 C. 26√17 D.

asked by Mermaid99 on May 23, 2016

Multiply. Simplify your answer. 1. (n + 3/n- 5) x (n^2 - 5n) A: n^2 + 3n 2. (6xy^2/2x^2y^6) x (6x^4y^4/9x^3) A: 2 3. (3h^3 - 6h/10g^2) x (4g/g^2 - 2g) (This is the correct expression. There is no typo.) A: ? 4. (m^2 + m - 2/m^2 -

asked by Victoria on May 30, 2014
8. ### Algebra

1. Subtract and simplify 18/y-8 - 18/8-y 2. subtract simplify if possible v-5/v - 7v-31/11v 3. Simplify by removing factors of 1 r^2-81/(r+9)^2 4. Divide and simplify v^2-16/25v+100 divided by v-4/20 5. find all rational numbers

asked by Anonymous on November 21, 2010