George sells baseball cards online. He estimates he can make $4.75 per card. If George has 83 cards, using front-end estimation, which choice would be closest to the amount George would make if he sells all his cards? A. $320
B. $400
C. $470
D. $500

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

Abag contains 10 white golf balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio of white to striped gold balls to remain the same. how many of each should he add?