These are separate questions that i decided to combine:

1. it takes sarah 50 minutes to walk to her friend's house 1 3/4 miles away. what is her walking pace in miles per hour?

2. the temperature in st. paul was 45 degrees fahrenheit. five minutes later it was 30 degrees fahrenheit. what was the average change in temperature per minute as an integer?

3. caroline bought 5 bracelets. find the total cost of the bracelets if each bracelet cost $3.10. justify your answer by using the distributive property.

4. explain why the expression 13x + 10 cannot be factored.

5. jamar earned $2,500 from his summer job at the grocery store. this is $350 more than twice what his friend todd earned. how much did todd earn from his summer job?

whoever is answering this answer the questions fully. this questions are just worded long and i don't know how to answer them. so answer all the questions above. you!

1).  Her walking pace is  (1.75 miles) / (50 minutes).

If you want it in units of (miles per hour), do it like this:

               (1.75 miles / 50 minutes) x (60 minutes / 1 hour)

           =  (  1.75 x 60 / 50 ) miles per hour.

2).  The average change was 

                         (30 - 45) degrees  / (5 minutes) .

I'm sure you can do the division and make an integer out of that.

3).  Each bracelet cost $3.10.
Caroline bought five of them, so she spent $3.10 five times.
Either do the multiplication, or else write down $3.10 five times
and do the addition.

4).  In order to factor the expression, the two terms would need
to have some common factor ... both terms need either a power
of 'x', or they need two numbers that have a common factor.
They don't both have an 'x', and 13 and 10 have no common factor.

5).  Todd earned 'T' dollars.
Twice what Todd earned is  2T .
$350 more than that is   2T+350 .
The question says that 2,500 is exactly that amount,
so you can write
                                                  2T + 350 =  2,500

Subtract 350 from each side:    2T           =  2,150

Divide each side by  2:              (you can finish it now)