There are 7 blue balls and 15 red balls in a urn. 3 balls are randomly chosen at once (without replacement). what is the probability that 2 blue and 1 red ball are drawn

What is 3-8 + 2v - v equal to?

an angles measure is 6 degress more than 3 times the measure of it complement. what is the angles measure

Ella simplifies (3b+4r) + (-2b-r) and says the result is b+5r. what error did ella make

Write the expression 2x2x2x2+7-5x5x5 using exponents

Joshua's goal is to sell more than 20 items at a farmers' market. So far, he has sold 6 items. Each of his customers buys 2 items. Let c represent the number of additional customers Joshua must have to meet his goal.

Aldo wants to install a skylight in the roof of his house. The base of the skylight is a regular hexagon with side length 40 cm. What is the perimeter of the base of the skylight? Give your answer in metres. Which strategy did you use to find out?

What is the LCM of 90 and 270?

How can you use models to explain why 3.1=3.10?

Scientific notation for 82,300,000

Factor completely 12y+6