The front yard of a house is 80 feet long and 50 feet wide. the backyard of the house is 50 feet long and 40 feet wide. what is the difference in area between the front yard and backyard?

If the measure of xyz is 81 what is the measure of yz

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.

What is the sum of the first 8 terms of the geometric series