4a^7*2a^3 multiply the coefficients

8a^10

Step-by-step explanation:

First know that if you multiply two exponents with same base you add the two base.

So, 2^7*2^3=2^10

Then calculate.

4a^7*2a^3

=4*2*(a^7*a^3)

=4*2*(a^10)

=8*(a^10)

=8*a^10

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)