7. K(2, 3), F(4, 4) 9. Y(2, 0), P(2, 6) 11. A(-7, -3), B(5,2) please help it's do tomorrow

What is the length of the unknown leg in the right triangle ?

30 pts, will mark brainliestwhat is the period of the sinusoidal function? (picture 1)what is the minimum of the sinusoidal function? (picture2)what is the maximum of the sinusoidal function? (picture 3)

Which of the following represents the factorization of the trinomial below? x^2+7x-30