If two line segments are congruent, which of the following must be true?
a. they have equal lengths.
b. they form a right angle.
c. they are equal.
d. they share an endpoint.

Daniel bought a computer game for $25 and later sold it to thomas for a 40% profit. how much did daniel sell the computer game for?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.