Find the slope of the passing line through the points (-4,7) and (-9,4)

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d? are he re