A60-watt light bulb uses 60 watt hours of electricity in 1 hour. suppose everyone in the united states lef one unneeded 60 watt light bulb on for one hour everyday for a year.

electricity is billed in kilowatt hours. so 60 watt hours is equal to sixty divided by one thousand. express the electricity used by a 60 watt light bulb in one hour in kilowatt hours in scientific notation.

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)

(50 ) mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.