The table shows information about the number of hours 30 children spent on theirtablets on 1 evening find out the class interval that contains the median b.)work out an estimate for the mean number of hours

If I remember from another table from another question I am pretty sure it was 3 hours.

Step-by-step explanation:

168

step-by-step explanation:

i am pretty sure that the answer is 168

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116