A researcher found that 55% of families in the United States have one child under the age of 21, 22% have two children under the age of 21 15% have three children under the age of 21, 5% have 4 children under the age of 21 and 3% have 5 or more children under the age of 21. If a family is selected at random, what is the probability the family has 1 or 2 children under the age of 21? (Express your answer as a percent, Please Include the % symbol .)

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

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.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2