2/3 of a number is ten what’s the number

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Which of the following are accepted without proof in a logical system? check all that apply.

If the discriminant if a quadratic equation is 4 which statement describes the roots?