How do i write the number 640,739 in expanded form

A recipe for a large batch of brownies uses one kilogram of sugar. Another recipe uses 800 grams of flour. How much sugar is needed for two batches of each recipe? Draw a model to support your answer.

First twenty counting numbers in base fifteen

What is the area of the region of the complex plane defined by $|z|<5$?

What is the perimeter of the quadrilatal below? 15cm

On the opening day at a toy store, every third customer gets a ball and every fourth customer gets a stuffed animal. Sixty people come to the store. How many both get a ball and a stuffed animal.

rode three miles farther each day than the day before for a week. In total one hundred and twenty six miles were rode. How far was riden on the last day of the week?

A farmer pays $23.00 for 7.5 pounds of food for his pigs. How much will it cost him for 12 pounds?

What is y when x is equal to 10 in 10x+y=19

Last year, Dan biked d miles. This year, he biked 411 miles. Using d, write an expression for the total number of miles he biked.

There are two options for purchasing tickets to baseball games. Single-game tickets cost $8 per game. Season tickets cost $195 plus $1.50 per game. Let g represent the number of baseball games. Let C represent the cost.