The Picture and Sound electronics store has hired Kiara to work in the warehouse. She uses a pulley with a hand crank to lift heavy boxes. There is a
proportional relationship between the number of times Kiara turns the crank to
lift a box, x, and the height the box has been lifted (in feet), y.
She turns the crank 4 times to lift a box 3 feet. Write the equation for the relationship
between x and y.
Y-

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.

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

Write the factored form of this trinomial 9x^2+18x-7