Sasha says if she knows the product of 9x8, she also knows the product of 8x9. is sasha correct? why or why not?

Yes Sasha is correct

Step-by-step explanation: Sasha is correct because all that was done was that the numbers were just switched around.

Sasha is correct because 8x9 is the same as 9x8. That is the commutative property of multiplication.That is how she is right.

40 is the final : )

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 -