IS this statement true, 12 + (13+10) = (12+13) + 10 and if so why

Jake has 3 hours before bedtime he must spend 2 hours dong homework. The rest of his time doing puzzles. It takes Jake 1/2 hour to complete each puzzle. Which equation modes the number of puzzles, Jake can complete before bedtime?

James works in a flower shop. he will put 36 flowers in vases for a wedding. he must put the same amount of tulips in each vase. the number of tulips in a vase must be greater than 1 and less than 10. how many tulips could be in each vase.

The sum of the digits of a two digit number is 8. if the ten digit is 4 more than the units digit what is the number

Round to the place value of the 5 in 562,408

The formula v equals the square root of the quantity 64 multiplied by h end of quantity can be used to find the velocity v in feet per second of an object that has fallen h feet. Find the height of an object when the velocity is 44 feet per second.

Which number is a rational number 49. 9/2 13/16 34

1) Ellie is an African elephant. When she was born, she weighed about 200 pounds. As an adult, she weighs 7 tons! How many pounds did Ellie gain over her lifetime?

A store decreased its price on a computer by $56 to $355. What was the original price? A. $299 B. $411 C. $301 D. $421

What is the distance in radians 5/8 of the way around the unit circle? A. 5π/8 radians B. 5/8 radians C. 5/4 radians D. 5π/4 radians

What are the solutions to the equation |2x - 3| + 4 = 17?