Uma urna contem 7 bolas brancas, 5 bolas pretas e 4 bolas vermelhas. qual a probalidade de retirarmos, ao acaso, uma bola preta?

Out of the 40 students in the 7th grade class, 60% of the students carry a cell phone. What fraction of the students in the 7th grade class carry a cell phone? How many students in the 7th grade class carry a cell phone?

How do you solve 6<_2g?

Is 9/15 equal to 6/10

Marta earns $12.50 per hour during a 40 hour week. If she works overtime, she earns time and a half pay for every additional hour that she works. This week, she has worked 46 hours. Determine her pay this week.

Tyra is training for a bicycle race. Each week she rides a total distance greater than 10 kilometers and less than or equal to 30 kilometers.

What is uniform motion in the subject physics

Which number represents the possibility of an event that is very likely to occur

Solve for b 5 (b-a) = r

If 10% of a number is 7, what is 80% of the number?

Write the equation of a circle M (7, - 10) and radius 2