25.6% of 250 +√ ? = 119

The average of 8 numbers is 27. If each of the numbers is multiplied by 8, find the average of new set of numbers.

if $$x-{1\over 5},x≠0,$$ then what is the value of $${x^6+3x^3-1}\over x^6-8x^3-1$$=?

If sin A=$${6\over 7}$$, then what is the value of sec A?

A container in the shape of a frustum of a cone having diameters of its two circular faces as 35 cm. and 30 cm and vertical height 14 cm. is completely filled with oil. If each cm3 of oil has mass 1.2g, then find the cost of oil in the container if its costs Rs. 40 per kg.

Direction: In the following questions two equations numbered I and II are given. You have to solve both the equations and give answer.
(A) x>y
(B) x≥y
(C) x˂y
(D) x≤y
(E) x=y or the relations ship cannot be established

I. $$ {x^2+9x+14=0}$$
II. $$ {y^2+y=2}$$

The graphs of the equations 3x + y-5=0 and 2x- y -5=0 intersect at the point P(α,β).  What is the value of (3α + β)?

If radius of a sphere is decreased by 48%, then by what percent does its surface area decrease?