1.solve the following system by substitution:

4x+y=24
y=-4x+24

2.solve the following system by substitution

y=2x+4
3x+y=9

Translate the following words into an expression: “the quotient of a number and three is five.”

Jane moves from a house with 71 square feet of closet space to an apartment with 45.44 square feet of closet space. what is the percentage decrease of jane’s closet space?

The data set represents the ages of players in a chess club. 27, 34, 38, 16, 22, 45, 54, 60. what is the mean absolute deviation of the data set?