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Question

please just answer one problem and explain how you did it thanks!

evaluate each expression if a = 3, b = 5 and c = 6

3(bc - 8) divided by a

Answer 1

http://www.algebrahelp.com/calculators/

Answer 2

b*c

-8

*3

/a

5*6 = 30

-8 = 22

*3 = 66

/3 = 22

Answer 3

3(bc - 8) divided by a  

note bc is the same as b x c

and 3 outside the parentheses is the same as 3 x (whatever is in the parentheses).  Sooooo ...

3(bc - 8) divided by a        can be rewritten ...

(3 x ((5 x 6) - 8)) / 3

Always calculate the inner-most parentheses first.

(3 x (30 - 8)) / 3

(3 x 22) / 3

66 / 3 = 22

Answer 4

= (3[bc - 8])/a

= (3[{ 5 * 6} - 8])/3

= (3[30 - 8])/3

= (3[22])/3

= 22

Answer: 22