How many different rectangles can be formed by connecting four of the dots in a3x3 square such that the sides of the rectangle are parallel to the sides of the grid?

since a 3x3 square of dots forms 3 vertical and 3 horizontal lines, we need to choose 2 from 3 for both horizontal and vertical.

3! /2! * 3! /2!

3*3 = 9

9 different rectangles can be formed.

the amount you'd have after the work is $1.55

step-by-step explanation:

you subtract 95% from $31.

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.