What is the solution of the system?

Use the elimination method.

2x + y=20

6x - 5y = 12

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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.

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How can 40x50 be solved using mental math?

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