Answer:
She jogs at a speed of 7mph
Step-by-step explanation:
Distance to the Park=21 miles
Let her Speed be r( miles/hour)
Time taken= t hour
Therefore her Speed, r= 21/t .....(I)
Distance on her Return Trip= 28 miles
On her return trip, the time is 1 hour longer, therefore time taken=(t+1) hour
Speed , r =28/(t+1) ........(ii)
Since her speed is the same
21/t=28/(t+1)
Cross Multiplying
21(t+1)=28t
21+21t=28t
21=28t-21t
21=7t
Therefore her time, t=3
From (I),
Speed r= 21/t= 21/3 =7 miles per hour
B is the first table
c is the second table
a is the third table
:)
X-2 for x=-3
-3-2=-5, add dem negatives
