U= b-k+a , for a

Help me solve this

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

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

Robert plans to make a box-and-whisker plot of the following set of data. 27, 14, 46, 38, 32, 18, 21 find the lower quartile, the median, and the upper quartile of the set? lower quartile: 19.5; median: 29.5; upper quartile: 42 lower quartile: 14; median: 27; upper quartile: 46 lower quartile: 18; median: 27; upper quartile: 38 lower quartile: 16; median: 29.5; upper quartile: 42