1) find the vertex and intercepts of the following quadratic functions. state
whether the parabola opens up or down. use this information to sketch
the graph.
a f(x) = 3(x-7)? +4

X+ y = 5 ; x - y =3 solve using linear combination

Apool measures 100 meters by 100 meters a toddler inside the pool and trows a ball 60 centimeters from one edge of the pool.how far is the ball from the opposite edge of the pool

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.