Why does 2^2-4i^2 equal 20 and not 8.

Ac contractor is building a new subdivision outside of the city. he has started work on the first street and is planning on the other streets to run in a direction parallel to the first. the second street will pass through (-2,4) find the equation of the location of the second street in standard form. a.2x+y=2 b. x-y=2 c.2x+y=2 d.x+y=2

How many days was the temperature above 90 degrees?

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits