I do not understand how to simplify 5y-8x-y+12x

Liam's bookstore sold 4 0 4040 notebooks and 2 0 2020 newspapers for a total of $ 1 3 0 $130dollar sign, 130. A day later, the bookstore sold 8 88 notebooks and 4 44 newspapers at the same prices, for a total of $ 2 8 $28dollar sign, 28.

The times it takes runners to complete a certain marathon are normally distributed with a mean of 4.6 hours and a standard deviation of 1.1 hours. What is the time for a runner with a z-score of - 1.

The perimeter of a right triangle is 24 meters, and the area is 24 square meters. The lengths of the sides are each multiplied by 4. What is the area of the new triangle? OA) 136 m OB) 184 m OC) 226 m OD) 384 m

A population has a mean muμequals=8787 and a standard deviation sigmaσequals=2424. find the mean and standard deviation of a sampling distribution of sample means with sample size nequals=64.

The Derby Dragons have a mean height of 72.0 inches and a standard deviation of 1.2. The Aviston Aces have a mean height of 70.8 inches and a standard deviation of 0.7. The Ballwin Bears have a mean height of 73 inches and a standard deviation of 1.

If 30+12x represents the area of a partitioned rectangle, what could be expressions for the side lengths? List at least 5 possibilities

Jay Low received scores of 87 and 98 on his first two exams of the grading period. At least what score must jay earn on the next exam for the test average to be at least a 93 for the grading period?

Keenan made a large batch of lemonade for his team. He poured 72 cups of water into a large cooler. Then he added 1 cup of lemonade concentrate for every 2 quarts of water and mixed all of the liquids together.

The tree club plans to hike 20 miles today. The hikers have covered 6 miles so far. If they travel at an average speed of 2 1/2 how many hours will it take to complete the hike

Victor has been instructed to stack boxes on a freight dock, arranged in perfect squares. If he has 625 boxes in each square, how many boxes are on the bottom row of each square? 5 boxes 15 boxes 25 boxes 35 boxes