1.) Mckenna pays 180 in total for her cell phone bill. She pays 45 the first month 90 the second month she pays 135 the third month and 180 for the final month.
2.) The constant proportionally of cookies would be 24/1 24 being the amount of sugar the cookies would need to make one batch.
3.) The amount of boys in Ms.Vaughen's class would be 6 if there are 20 girls in the class you would divide that by 3 which gets you 6 and 20 divided by 6 gets you 3.
Hope this helps!
