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Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is