Aboy is x years old. his sister is twice as old he is. the sum of their age is 27, how old is the boy?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

I’m really confused and need your assist me with this question i’ve never been taught