One number is 6 less than another number. Their sum is 50. What is the smaller number? If x = the larger number and y = the smaller number, then which of the following systems could be used to solve the problem?

x + y = 50 and -x + y = 6
x + y = 50 and x - y = 6
x + y = 50 and x + y = 6
x - y = 50 and x + y = 6

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.

What are “like terms”? why can we only add like terms?

Which expression is rational? 6. , square root two, square root 14, square root 49