Answer:
the answer is triangles ABC and DEC are similar
Step-by-step explanation:
angle C is a common angle for both triangles
angle D is equal to angle A ( corresponding angles)since they are parallel
angle B is also equal to angle B for the same reason as angle D and A
since the three angles of the two angles are equal they are similar
15 because the highest amount of coins he can use are 25 and the lowest is 10 so 25-10 is 15
I showed my steps, and 3y-4 does equal 5
