Which pair of measurements is not equivalent? 450 mm, 4.5 m 250 cm, 2.5 m 4 km, 4,000 m 1.2 cm, 12 mm

What is the square root of 45? (step by step working plz)

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Suppose a gym membership has an initial enrollment fee of $75 and then a fee of $29 a month. which equation models the cost, c, of the gym membership for m months?