{y= 5x +3 y= x - 9 how do you solve it

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

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.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)