Arecipe requires 5.5 teaspoons of sugar to make a cheesecake. which equation shows the number of teaspoons of sugar, y, needed to make x cheesecakes?
x = 5.5y
y = 5.5 + x
y = 5.5x
x = 5.5 + y

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Use the graph of the sine function y=2sinθ shown below

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