Evaluate: -6k
when k = 6

-36

Step-by-step explanation:

Since we know that the value of 'k' is 6, we can replace 'k' with 6.

⇒

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Reminders:

- Remember, whenever there is a variable next to a number, this means that you should multiply the value of the variable by the coefficient.

- Coefficient: the number in front of a variable.

- Variable: a symbol (usually a letter) standing in for an unknown value.

- Do not get confused by the word "evaluate." This simply means to solve.

- A negative number multiplied by a positive number will always equal a negative number.

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

not sure but it may be b, as i said i'm not sure.