Bus one had half of the grade eight students and 6 grade, seven students, bus two had 15 grade seven students and one-third of grade eight students, how many students are there in grade 8 ? ?
it's an algebra question

The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. what is the probability that a randomly selected broiler weighs more than 1,425 grams?

The width of a rectangle is half as long as the length. the rectangle has an area of 18 square feet. what are the length and width of the rectangle?

Answer asap! due in 30 minutes! ! 8th grade math