An architect decides to use a parabolic arch for the main entrance of a science museum. in one of his plans, the top edge of the arch is described by the graph of y = -1/4x^2 + 5/2x + 15. what are the coordinates of the vertex of the parabola?

Lucy and donavan measured the length of the school garden. lucys measurement is 11.3m and donavans measurement is 113 cm. could both be correct? explain

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)