Which statement is always true about an acute triangle
a: no sides are congruent
b: all three angles are congruent
c: all three angles are less than 90 degrees
d: on angle is greater than 90 degrees

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.

What is the area of the shaded sector?