4/16+12/16=how to figure out this problems

What 2 number add up to 0.21. 0.01, 0.11, 1.1, 0.1, 0.9, 1.2

Simplify expression 16 + (4x6) - 3^2

How to add 3.102+6and3/4+20

Danny Daw Geater is challenged to eat 45 hotdogs in a hot dog eating contest. After he has eaten 18 of them, what percentage of his goal has he eaten?

Which relationship has a unit rate of 60 miles per hour

Carol has two cats rover and Bobo. Rover eat three fourths of a can of cat food each day and bobo eat a half of a can of cat food each day. Cat food cost five dollars for three cans. It's is only sold in three can packs.

Write a system of equations with (1,-2) as its solution

which has the best unit rate? 16 oz for $4.25 or 20 oz for $ 4.55 I chose 16 oz but I need to make sure it's right

Is 3√ a irrational number

Does anyone know what 2 to the 3rd power means?