Can someone please help me on the questions I just posted? I'll do anything.

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?