Determine which of the expressions are equivalent. :: (3+9i) + (-9+i)
:: (1 + 2i) – (7 + 8i)
:: 14-(4-3i) - 9i
:: -8- (-2+i) +11i
:: 3i(4 + 2i)
:: (2+2i)(1+4i)

Which equation represents the partial sum of the geometric series?

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

Arecipe calls for 32 fluid ounces of heavy cream.how many 1 pint containers of heavy cream are needed to make the recipe?