How do I write 19.4 in expanded form

Sarah lost 12 pounds over the summer by jogging each week. By winter time, she had gained 4 3/8 pounds. Represent this situation with an expression involving signed numbers. What is the overall change in Sara's weight.

An earthquake measuring 6.4 on the Richter scale struck Japan in July 2007, causing extensive damage. Earlier that year, a minor earthquake measuring 3.1 on the Richter scale was felt in parts of Pennsylvania.

4 of 1 Derek had a birthday party at Sky Zone. The company charged $45 to rent out the party room and an additional $4 per person that attended the party Write an equation that represents the total cost of the party. y, if x people attended.

Which sample is biased? 1) interviews of random teenagers who attended a rock concert to find out which musician teens enjoy most 2) a poll randomly surveying half of the students in grade 7 to find out which seventh-grade teacher at the school is

A restaurant sells pizza in 3 different size portions. The table shows the costs of each portion. Cost Portion Size $1.00 1 slice $3.15 3 slices $5.70 6 slices Choose the words or phrases that complete the statement.

Simplify so that there are only positive exponents (3^9/3^-5)

The mean length of 7 books is 258 pages. the longest book has 294 pages. what is the mean length of the other 6 books

A pyramid has n sides what is the expression for the total number of sides

The sum of Sally and Beth's age is 60. Six years ago, Sally was 3 times as old as Beth. What are their present ages?

A circle has a radius of 37 units and is centered at (1.3, - 3,5). What is the equation of the circle?