For a moving object, the force acting on the object varies directly with the objects acceleration. when the force of 81 n acts in a certain object, the acceleration of the object is 9/ms^2. if the force is changed to 63n. what will be the acceleration of the object?

Step-by-step explanation:

It is given that,

For a moving object, the force acting on the object varies directly with the objects acceleration.

When the force of 81 N acts in a certain object, the acceleration of the object is 9/ms^2.

......(1)

If the force is 63 N then,

......(2)

On solving equation (1) and (2), we get :

So, the acceleration of the object is when the force acting on it is 63 N. Hence, this is the required solution.

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".

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23