El piso de un salón cuadrado de 4,8m de lado se cubrió con tabletas cuadradas de 30cm de lado

¿Qué representa el área del salón?
¿Cuántas tabletas se usaron para cubrir toda la superficie del piso?
Si el diseño es ajedrezado, es decir, blanco y negro ¿Cuántas tabletas de cada color se utilizaron?
¿Qué área del salón quedó cubierta con tabletas negras?

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12