Rewrite the expression by using grouping symbols. y • 4 + y • z
a.4(y + z) b. y • (4 + y) • z c. z(y • 4) d. y (4 + z)

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

Timmy uses 1 1 2 cups of sugar for every 2 gallons of lemonade he makes. how many cups of sugar would timmy use if he makes 13 gallons of lemonade?

Express -5 2/5 as an improper fraction.