So,
5y*3 is the open phrase the student uses to model "the sum of 5y and 3".
"The sum of" means addition. The student put 5y*3, while the sum of 5y and 3 is actually 5y + 3.
Answer:
or 200.173913
Step-by-step explanation:
Sn = n/2 (a1+an)
= 8/2 (3-38)
= 4 (-35)
= -140
The answer is d= -2an+2s/n^2-n
That answer should be in a fraction form.
B is your awnser! sorry if im wrong my calc shows its without a - symbol
