exam Maths Puzzle Numerical Ability

At Gwen's grage sale, all books were one price, and all magazines were another price. Harriet bought four books and three magazines for $1.45, and June bought two books and five ma

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Could someone please help me with these problems?

Solve the following equations. Round to 4 decimal places when necessary.

a. Log3 x=8

b. 27^2x+2=81^x-3

c. log2 (3x+2)= Find the x- and y-intercepts for x - 3y = 6. Use these to graph the line.