Which expressions are equivalint to 3x +2(x - 1) -4 a. 3x + 2(x -1) -4 b. 5x - 6 c. 3(x - 4) d. 3(x + 2) -6 e. 6(x - 1)

A.  3x +2(x - 1) -4 and B. 5x-6

Step-by-step explanation:

One of the answers is letter A because its the same exact expression as stated in the question. The other answer is B because of the distribution property you multiple x by 2 and multiply -1 by 2. This now gives us the expression 3x+2x-2-4. Now we add/subtract like terms and that gives the the answer 5x-6. I hope this helps.

B. 5x - 6

Step-by-step explanation:

You just need to expand the expression, 3x + 2(x - 1) - 4

1) expand the brackets first (laws of arithmetic), 3x + 2x - 2 - 4

2) Simplify and you will get 5x - 6 which is option B

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

6 spoons of sugar for every 21 cups of flour

step-by-step explanation: