Yall please help, last question Reina and Sam are multiplying (8^4)^5 (7^3)^9.
Reina's Work: (8^4)^5 (7^3)^9 = 8^4 + 5^7^3 + 9 = 8^97^12
Sam's Work: (8^4)^5 (7^3)^9 = (8^4)⋅^57^3⋅^9 = 8^207^27

correct answer is Sam's work

(8^4)^5 = 8^(4*5) = 8^20

(7^3)^9 = 7^(3*9) = 7^27

answer

Sam's Work: (8^4)^5 (7^3)^9 = (8^4)⋅^5 7^3⋅^9 = 8^20 7^27

b

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -