Let the number of hour it took them to have completed the same number of problems be x, then
15 + 10x = 9 + 12x
12x - 10x = 15 - 9
2x = 6
x = 6/2 = 3
After 3 hours, they must have completed the same number of homeworks.
X=10 Y=1.25; X=8 Y=1; X=6 Y=0.75; X=4 Y=0.5
Step-by-step explanation:
=99*9/11
- -
_____
=891/11
=81
Answer:
Step-by-step explanation:
8,1 8,2
8,3 8,4
8,5 8,6
Answer:
the length is (1,3
Step-by-step explanation:
the length is 3,1