Match the pairs of equations that represent concentric circles. tiles 3x2 + 3y2 + 12x − 6y − 21 = 0 5x2 + 5y2 − 10x + 40y − 75 = 0 5x2 + 5y2 − 30x + 20y − 10 = 0 4x2 + 4y2 + 16x − 8y − 308 = 0 x2 + y2 − 12x − 8y − 100 = 0 2x2 + 2y2 − 8x + 12y − 40 = 0 4x2 + 4y2 − 16x + 24y − 28 = 0 3x2 + 3y2 − 18x + 12y − 81 = 0 x2 + y2 − 2x + 8y − 13 = 0 x2 + y2 + 24x + 30y + 17 = 0

Easy points boii. read it. ya. fresh

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

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.