If the diameter of a circle is increased by 100%, its area is increased by:
There are 850 students in a school. Find the number of boys if the number of girls is 56 less than the boys.
If a+b+c=0;what is(b+c)(b-c)+a(a+2b)
If (q)=9q2 +tq+5; if (1)=21;find it?
The difference between 5 times a certain number and 2 times the same number is 36. The number is:
