Which is the most efficient way to solve this equation?
X + 7 = 12

○Subtract 12 from both sides of the equation so all terms will
be on the same side of the equal sign.
○Add -7 to both sides because that will result in an equivalent
equation with x alone on one side
○Nothing, because the equation is already solved
○Add 7 to 12 because x equals 19.

What expression is equivalent to 1/2(2+3x-6)

What is the solution of the systems of equations? y=2/3x+3 x=-2

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.