exam Maths Puzzle Numerical Ability

Solve each equation by the subtraction method. Determine whether the equation are independent, dependant, or inconsistent.

28. x =y + 4
3y - 2y = 4

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exam Other Question

A course consits of four 100 point exams. A student scores 60 points on the first exam. What average must be obtained on the next three exams to obtain an overall average of 75%? Geometry. A square has sides of length 3x - 2 cm. Express the area of the square as a polynomial.

Please help with this. Thanks.