Find the most important variable in the problem.

There are 13 fish in an aquarium. Seven of the fish are guppies. How many non-guppies are in the aquarium?

A. the number of guppies

B. the number of non-guppies

C. the total number of fish

Ascatterplot is produced to compare the size of a school building to the number of students at that school who play an instrument. there are 12 data points, each representing a different school. the points are widely dispersed on the scatterplot without a pattern of grouping. which statement could be true

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?