Sarah has completed 0.4 of her word puzzle book, which contains 90 puzzles. if she completes 6 more, how many puzzles are left to complete?

Suppose the first five terms of a sequence are 4, 5, 9, 27, 123. how could the next term in the sequence be generated?

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

What is the value of x in the diagram below?