Is -12 rational or irrational

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?