Using the complete the square method rewrite f(x)=x^2+4x-1

Atrucker had a load of grain containing 2 tons. she unloaded 1 ton and 1,200 pounds at the warehouse. how much grain does she still have left on the truck?

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)