Answer:
26.4 km/hr
Step-by-step explanation:
Sofia and Diego drive to work.
For Sofia
We convert miles to km
Sofia drives 72 miles in 1.5 hours.
1 mile = 1.6 km
72 miles = x
x = 72 × 1.6 km
x = 115.2 km
We find the speed in km/hr
Speed = Distance /Time
= 115.2km/1.5 hours
= 76.8 km/hr
For Diego
Diego drives 126 km in 2 hour 30 min.
Speed = Distance/Time
Time = 2 hour 30 min = 2.5 hours
Speed = 126km/2.5 hours
= 50.4 km/hr
The difference between their average speeds in km/h is calculated as:
76.8 km/hr - 50.4 km/hr
= 26.4 km/hr
Answer:
solve for X
17-4x=33
-4x=33-17
-4x=16
-4x/-4=16/-4
x=-4
Step-by-step explanation:
1. move the constant (17) to the right side
2. subtract the numbers on the right side (33-17)
3. Divide both sides of the equation by -4 (/4)
4. write the answer x= -4
Solved.
1st on the left matches with y. 2nd matches with 6x-2y. 3rd matches with 2x+y.