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Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?