What is the length of a car if the length on the scale model car is 17 cm and the scale is 2 cm : 50 cm?

the length of the car is 425 cm

Step-by-step explanation:

car is 17 cm and the scale is 2 cm :50 cm

The length of the model car is 17 cm

Scale represent 2 cm is 50 cm

Now we  make a proportion using the scale model

Cross multiply it

Divide by 2 on both sides

x= 425

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".