Erica knits 18 squares on Monday. She knits 7 more squares each day for the rest of the week. How many squares does Erica have on Friday?

8 answers

google sum of arithmetic sequence

Math is fun site is good for this
http://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html
a is 18
d is 7
i guss 53
7×4=28 28+18=46
its 56 because 18 plus 7 plus 7 plus 7 plus 7 equals 56
its 46 because what soyna said was true and made a lot of sence
first time here, umm I guess also 46? ( still working on my test )
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