exam Maths Puzzle Numerical Ability

what is x^2-25 when factored? the question reads factor each polynomial completely.

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exam Other Question

a CD costs $3.50 more than a tape. Write an expression for the total cost of 1 CD and 1 tape. to draw and label axis
plot and label x+y=4

y=2x-3
y=2-2x2=2
could you please help i am only 9 and its my first algerbra work