Two sides AB and BC, and the median AD of △ABC are correspondingly equal to the two sides PQ and QR, and the median PM of △PQR. If AB=11cm,AD=3cm, and AC=6cm, then the length of PR is:
The area of a trapezium is 322 cm2 and the distance between its parallel sides is 28 cm. If one of the parallel sides is of length 16 cm, find the length of the other side.
ABCD is a square. Two arcs are drawn with A and B as centers, and radius equal to the side of square. If arcs intersects at point E, find the angle ∠BDE.
A telecom operator charges $1 for the first minute and then $0.7 per minute for subsequent minutes of a call. If the duration of call is represented as d, and amount charged is represented as c, find the linear equation for this relationship.