A5l solution was 21% vinegar was mixed with a 13l solution that was 60% vinegar. find the new concentration of vinegar.

Emma will roll two number cubes labeled 1 through 6. she will record the sum of the two numbers after each roll. she will roll the two cubes 540 times. how many times should emma expect the sum to equal 5?

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30