Is 0.212121212121 ... a rational number because a irrational number does not terminate or repeat?

20. Simplify this expression: 13 + (-12) - (-5) = ? O A. 6 O B.-6 O C.-30 O D. 30

Calculate the momentum of a 1 kg ball that is moving eastward at 12 m/s.

What is the value of x in the equation 2 (x-4) + 7-=3

Marshall left home biking at a constant rate of 20 mph. One hour later, it looked like it may rain, so his friend, Brett, set out in his car to pick him up. Brett drove at a constant rate of 60 mph.

Factor completely. 49 t6 - 4 k8

What are like terms how can u combine them?

What's equivalent to y^9 - y^3

Express each answer in simplified radical form 2√7+4√63=?

Q = (c+d) / 2 solve for d

Is 1931 divisible to 9