(5+3i)(2+4i)how do you solve in quadratic form

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

Which point-slope form equation represents a line that passes through (3,-2) with a slope of -4/5

Carl is hanging pictures in his home. there is a space on a wall that has a width of 4 feet. carl has pictures with different widths. which picture width would fit in the space on the wall? a. 46 inches b. 60 inches c. 50 inches d. 54 inches