Find the center and radius of the circle with equation (x-1)^2+(y+1)^2=4

Angel entered a triathlon (a three-part race). he swam 1 mile, rode his bike 30 miles, and ran 10 miles. how far did he go altogether? a. 11 miles b. 123 miles c. 41 miles d. 40 miles

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.