Speed = distance / time
7 = 17.5 / t
t = 17.5 / 7
= 2.5 minutes
3 goes into 5 one time
Hope this helped :)
Answer:Mark Is 9 years old; Christine is 5 years old
Step-by-step explanation:
Present age
LET mark age be x
Christine be x-4 yrs
In 3 yrs Time
Mark will be x+3 yrs old
Christine will be (x -4 +3) = x-1 years old
Also, In 3 years time
Christine = 2/3 Mark
such that
x-1 = 2/3(x+3)
x -1= 2x+6 / 3
3x -3= 2x+6
3X--2X = 6+3
=X=9
Mark Is 9 years old
Christine is x -4 = 9-4=5 years old
maybe bc of how many times you can add the number itself
Answer:
5 times 3
Step-by-step explanation:
you do 5 time 3. it is 15
