How many complex zeros does the polynomial function have?
f(x)=2x4 + 5x3 – x2+6x – 1
Enter your answer in the box.

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Mrs. blake's bill at a restaurant is $42.75. she wants to leave the waiter an 18% tip. how much will she pay in all, including the tip?

Find the value of the combination. 5 c 5