could someone help validate my answers?

Question

A.

-5(-6)(-7)

-5(42)

-210

 

B. -8(2-7)-9(3-5)

8(-5)+18

-40+18

-22

 

C. (-4/3)^2

-4/3 x -4/3

16/9

 

D. 4/9 x 27/8 

and i got 3/2

 

are these correct? please help

 

 

Answer 1

A, C, and D are correct; good job.   B, however, is not correct; you lost the negative sign in front of the 8:

 

-8(2-7) - 9(3-5)

-8(-5) - 9(-2)

40 - (-18)

40 + 18

58