Make an equation
6p + p = 28
Combine like terms
7p = 28
Divide
p = 4
Solution: p = 4
The answer is the last one listed...
hope that helps
45mph times x hours one way
30mph times y hours back
x+y=3 hours 15 minutes
45mph(x)=z miles
30mph(y)=smiles
so

and substituting we know 15 minutes is 1/4 an hour so we have

so 1.95 is how long they were going 30mph
1.95hours time 30mph is 58.5 miles.
so that is the distance. check by putting in y and solving for x. multiply x by 45 and you should get the same distance
Six and seven (6 and 7)
If you take the square root of 38, you get 6.1644.....76. This number falls between 6 and 7.