The least-squares regression equation y = 10+2x=10+2x describes the relationship between xx = age (in weeks) and yy = weight (in pounds) for a sample of 50 German shepherd puppies for ages 5 ≤ xx ≤ 20 weeks. The weight of a particular German Shepherd puppy that is 10 weeks old is underestimated by 10 pounds. How much does this particular puppy weigh? A. 10 B. 20 C. 30 D. 40 E. 50

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Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

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.