Ella simplifies (3 b + 4 r) + (negative 2 b minus r) and says the result is b Plus 5r. What error did Ella make?

Answer and Step-by-step explanation:

So Ella starts out with with the equation:

(3b + 4r) + (-2b - r)

and results in b + 5r.

Let's solve for ourselves to see what Ella did wrong.

3b + 4r - 2b - r

4r - r = 3r

3b - 2b = b

b + 3r

We can see that Ella mistakenly added the r and 4r to become 5r, instead of subtracting the two.

#teamtrees #WAP (Water And Plant)

Answer and step-by-step explanation:

So Ella starts out with with the equation:

(3b + 4r) + (-2b - r)

and results in b + 5r.

Let's solve for ourselves to see what Ella did wrong.

3b + 4r - 2b - r

4r - r = 3r

3b - 2b = b

b + 3r

f

step-by-step explanation:

f

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