Solve the equation: 25-3x=40

A. -15
B. -5
C. -2
D. -4​

What is the area of the triangle 10 13 12

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).