A leak in a pool causes the height of the water to decrease by 0.25 foot over 2 hours After the leak is fixed, the height of the water is 4.75 feet The equation 4.75 = x +(-0.25) can be used to find x, the original height of the water in a pool. What was the original height of the water in the pool in feet?

Step-by-step explanation:

5 feet

Since the height of the water is 4.75 feet, the equation is

4.75 = x + (-0.25)

To solve, add 0.25 to each side:

4.75+0.25 = x+(-0.25)+0.25

5.00 = x

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".