Answer:
15a^2 -17a +4
5a x 3a = 15a^2 bc a times a makes it squared.
next, 5a x -1 = -5a
and then -4 x 3a = -12a
-5a -12a (bc they're like terms) = -17a
then, -4 x -1= 4 ( two negs cancel each other out)
I apologize for my mistake the first time
Answer: 20.2 mph
Step-by-step explanation:
Given
Train travels 10.1 miles in half an hour i.e.
Distance
time
we know,
Insert the values
5=ones
2=tens
5=hundreds
4=thousands
3=ten thousands
I know that 12-2 would be 10 in simplest form
I think it is d=5 because when you add them all up and divide by 5 it is 5