Answer:
Step-by-step explanation:
A)
Given Claire runs 10 km in 1 hour,
in half an hour, she runs half of 10km = 5km
In 2 1/2 hours, she run 2.5 times of 10km = 25km
B)
Given Malia runs 5 km in 1 hour,
in half an hour, she runs half of 10km = 2.5km
In 2 1/2 hours, she run 2.5 times of 5km = 12.5km
A) 5km, 25km B) 2.5km, 12.5km
A)Claire runs 10 km in 1 hour.
she runs 10/2=5km in 1/2 hour.
in 2 1/2, she runs 10*2 1/2=25km
B)Malia runs 5 miles in 1 hour.
she runs 5/2=2 1/2km in 1/2 hour.
in 2 1/2, she runs 5*2 1/2=12 1/2km
ok first
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Answer: Second option.
Let be "e" the number of easy puzzles Tina solved and "h" the number of hard puzzles Tina solved.
Set up a system of equations:
You can use the Eliminationn Method to solve this system of equations:
Therefore, through this proccedure, you get:
subtract first term from second term
c.d=T2_T1
c.d= -13-(-6)
c.d= -13+6
c.d= -7