Answer:
F has 10 marbles and I has 5 marbles.
Step-by-step explanation:
First, I subtracted 10 from 15 since F has 10 more marbles than I. When I subtracted I got 5.
Hope this helps!!!!
Answer:

Step-by-step explanation:
Let points D, E and F have coordinates
and 
1. Midpoint M of segment DF has coordinates

2. Midpoint N of segment EF has coordinates

3. By the triangle midline theorem, midline MN is parallel to the side DE of the triangle DEF, then points M and N are endpoints of the midsegment for DEF that is parallel to DE.
Answer:
a3 b4 c2 d1
Step-by-step explanation:
Answer:
b im pretty sure
Step-by-step explanation:
2x - 5y = -10
5y = 2x + 10
y = 2/5x + 2
Equation of a line is given by y = mx + c; where m is the slope.
Therefore, the required slope is 2/5