Jennifer has $ 160 in her wallet. She also earns $10 each hour she babysits. Write an expression that could be used to determine how much she earns after h hours.

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

Volume of cylinder with a radius of 8cm and height of 25 cm

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?