Question

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

Ella incorrectly combined the b coefficients. The correctly simplified expression is 5 b + 5 r.
Ella incorrectly combined the b coefficients. The correctly simplified expression is Negative b + 5 r.
Ella incorrectly combined the r coefficients. The correctly simplified expression is b – 5r.
Ella incorrectly combined the r coefficients. The correctly simplified expression is b Plus 3r.b

Answer 1

Explanation:

so the expression is as I understand it

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

this is without the brackets

3b + 4r - 2b - r = b + 3r

so the correct answer is the last answer option :

Ella incorrectly combined the r coefficients. the correctly simplified expression is b + 3r

Answer 2

D

Explanation:

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

Ella incorrectly combined the b coefficients. The correctly simplified expression is 5 b + 5 r.

Ella incorrectly combined the b coefficients. The correctly simplified expression is Negative b + 5 r.

Ella incorrectly combined the r coefficients. The correctly simplified expression is b – 5r.

Ella incorrectly combined the r coefficients. The correctly simplified expression is b Plus 3r.b