exam Maths Puzzle Numerical Ability

<a is complementary to <c. If <a=2x-10 and <c=4x+10, find the m<a and m<c.

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exam Other Question

The following trinomial is in the form ax^2 + bx + c. Find the two integers that have a product of ac and a sum of b. Do not factor the trinomials.

15t^2 - 17t - 4 y=x^2-7