Answer:
C and D
Explanation:
To determine which of the given expressions is equivalent to 6a+3b+2c, we can compare the coefficients of the variables a, b, and c in each option.
Let's go through each option and simplify them:
a. 9ab+2c: This expression has a coefficient of 9 for the variable a, which is different from the coefficient of 6a in the original expression. Therefore, option a is not equivalent to 6a+3b+2c.
b. 2c3b+6a: This expression has a coefficient of 6 for the variable a, which matches the coefficient in the original expression. However, the order of the terms is different. Therefore, option b is not equivalent to 6a+3b+2c.
c. 6a3b+2c: This expression has the same coefficients for all the variables as in the original expression. Additionally, the order of the terms is the same. Therefore, option c is equivalent to 6a+3b+2c.
d. 6a+3b+2c: This expression is the same as the original expression. Therefore, option d is equivalent to 6a+3b+2c.
In conclusion, the expressions that are equivalent to 6a+3b+2c are options c and d.