Answer:
Second Option, m+7n+30
Step-by-step explanation:
First I'd combine the m terms
22+5m-4m+7n-8
5m-4m
=1m
22+1m+7n+8
Now the numbers with no variable
22+1m+7n+8
22 + 8
=30
<em><u>m+7n+30 </u></em>is our final answer
See the photo mate.As we know time=speed/time than as he travelled 4km in 1 hour probably his speed is 4km/h than time required to travell 7km
Time=7/4=1.75hours
Factor the trinomial

by the box method.
The multiplication gives -24y^2. Now we need to find two factor that gives 5x. It should be creal that this factor are 8y and -3y. Then:
Now we find the common factor for each column and row:
Therefore:
Answer:
The last one is the answer.