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
