Two buttons with smiling faces and two buttons with sad faces are in a row as shown in the picture (attached below). when you press a button the face changes, and so do the faces of the neighboring buttons. what is the minimum number of button presses needed so that only smiling faces can be seen? Note: neighboring buttons = buttons NEXT to it.

the answer will be

answer:

step-by-step explanation:

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation:

8

step-by-step explanation: