If pizzas cost $9.83 per pizza, estimate how much money you would need to buy 18 of them.

your answer does not need to be exact, so do not use a calculator and do not put a $ sign in your answer.

180

Step-by-step explanation:

This is a good question to keep in mind. When you do use a calculator the answer to this estimate will tell you if your work on the calculator is correct.

round the cost of the pizza to 10

18 * 10 = 180 dollars. So you should get an answer that is under 180 dollars -- about 3 dollars short. (0.17 * 18 which is another guess).

Now pick up your calculator and do the math. It comes to 176.94

If you do any grocery shopping, this is a good skill to have.

the answer to the question is a  

it has the same slope and the same y-intercept.

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".