exam Maths Puzzle Numerical Ability

Solve the linear system by graphing.Using a staright edge to draw your lines

x + y = 1
3x - y = -5

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exam Other Question

Amelia chose 3 CDs that each cost $16. The sales tax on the three CDs is $3.96. Write a direct variation equation relating sales tax to the price. Graph the equation you wrote in. f(x) = -0.019x^2 + 3.04x - 58.87 describes newspaper circulation (in millions) in the US for 1920-1998 (x = 20 for 1920). When did the circulation approximate 45 million?