Move the rest of the shapes to the correct group

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

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?