What is the decimal number to
Decrease by 15%

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2