Determine which expression (s) is in its simplified form. Select all situations that apply.

12/15

5/8

4/8

9/18

1/9

Jon works at Starbucks and makes $15 per hour and works 20 hours per week. How much will he earn in a year?

How to calculate the area of trapezium by only giving one base?

12 + 3x - x - 12 = ?

12:4 (9-6) * 24+4 to the second power

An average person's hair grows at a rate of 18 cm per year. How fast in inches per month does the average person's hair grow? Show all work for solving by using the correct conversions factors. Round your answer to the nearest tenth.

You have 10 liters of juice that is 40% juice and 60% water. You want the mixture to be 70% juice and 30% water. How many liters of pure juice do you need to add to the mixture?

Huilan is 6 years older than Thomas. The sum of their ages is 84. What is Thomas's age?

How can 40x50 be solved using mental math?

To investigate the relationship between amount of sales y (in thousands of dollars) and the amount x (in hundreds of dollars) spent on advertising, a marketing researcher chooses eight cities of approximately equal populations and spends differing

The total number of human genomic characters is 3.5 billion. Express this quantity numerically without using a decimal