exam Maths Puzzle Numerical Ability

Triangle question
sailboat has area of 64 square ft height 16ft what is the base
Is it A=1/2(b)(h) = 64=2bx16 I am stuck after that

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exam Other Question

Find the x- and y- intercepts of 7x-2y=-5 and use them to graph the equation.

Please provide me with as many steps as possible. I am trying really hard to understand how to do these. Thank you.
a wedge of cheese is 2 inches tall. the triangular base of this right prism has two 9 inch edges and a 4 inch edge. several congruent wedges are arranged around a common 2 inch seg