What is the value of the series 1+2+3+….+na. (��(��-1))/2
b. (��(��+1))/4
c. (��(��+1))/6
d. (��(��+1))/2

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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?

Which of the following shows the length of the third side, in inches, of the triangle below

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?