your family is driving to houston,texas.A sign indicates that you are 700 miles from houston.Your car's trip odometer indicates you are 400 miles from home.YOu are traveling at an average speed of 60 miles per hour.

A. write an expression for the distance(in miles) you will be from houston in x hours

B. Write an expression for the distance (in miles) you will be from home in x hours.

C. use the expressions from parts (a) and (b) to write and solve an equation to find the number of hours you will drive until you are exactly halfway between houston and your home.

D. suppose you travel by local roads instead of the highway.you travel the 700 miles at a speed of 45 miles per hour.How long will you drive before you are exactly halfway between houston and your home?

please help me.
i tried to do this already
and nobody has helped me

I am sorry my previous attempt to help you was not understood.

http://www.jiskha.com/display.cgi?id=1228878914.1228879850

I did my best to explain the logical steps, but apparently failed. If you could possible afford a private tutor who can spend more time with you, it would help a lot.

Start by writing basic equations

Again, drwls not reading the math problem correctly. He probably needs a tutor. And yes, it's been like 9 years.

98

thank you i finally understand

A. To find the distance from Houston in x hours, we need to subtract the distance traveled from home. Since you are traveling at an average speed of 60 miles per hour, the distance from Houston in x hours can be expressed as:

Distance from Houston = 700 - (60 * x)

B. To find the distance from home in x hours, we need to subtract the distance traveled from Houston. Since you are traveling at an average speed of 60 miles per hour, the distance from home in x hours can be expressed as:

Distance from home = (60 * x) - 400

C. To find the number of hours until you are exactly halfway between Houston and home, we need to set the two distances equal to each other.

700 - (60 * x) = (60 * x) - 400

Simplifying the equation, we get:

2 * (60 * x) = 700 + 400
120 * x = 1100
x = 1100 / 120
x = 9.17 hours

Therefore, you will drive approximately 9.17 hours until you are exactly halfway between Houston and your home.

D. If you are traveling at a speed of 45 miles per hour on local roads, we can modify the expressions from part A and part B accordingly.

A. Distance from Houston = 700 - (45 * x)
B. Distance from home = (45 * x) - 400

To find the number of hours until you are exactly halfway between Houston and home, we set the two distances equal to each other.

700 - (45 * x) = (45 * x) - 400

Simplifying the equation, we get:

2 * (45 * x) = 700 + 400
90 * x = 1100
x = 1100 / 90
x = 12.22 hours

Therefore, if you are traveling at a speed of 45 miles per hour on local roads, it will take approximately 12.22 hours to be exactly halfway between Houston and your home.