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which is incorrect and why?

a)
a, the student should have used the division property of equality in step 3

b)
a, the student combined like terms incorrectly in step 1

c)
b, the student should have used the addition property of equality in step 2

d)
b, the student should have used the multiplication property of equality in step 2

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

Which graph represents the equation y =4x

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line