Use slope to determine if lines AB and CD are parallel, perpendicular, or neither. A(-9,-12)

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

The distance between two cities is 368 miles. if the scale on the map is 1/4 inch=23 miles, what is the distance between the cities on the map?

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.