Plot the points in a coordinate plane. Then determine whether AB and CD are congruent
A(-2, 1), B(2, 1), C(3, 2), D(3, -2).

Plz help ASAP

At a lunchron, guests are offered a selection of five different grilled vegetables and four different meats. in how many waya could one choose three vegetables and two meats?

Icould really use some with this question.

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?