Question

Ques-5) Short type of questions:
I)Using suitable identities find (102)2.
ii) Simplify: - 45p3 = 9p2
iii)A polyhedron has 30 edges and 12 vertices. Find number of faces by using
Euler's formula?
(iv) A second hand Tv is for Rs 2500. And then Rs 500 was spent on its repair
and sold for Rs 3300. Find profit/loss percent.
(v) Solve : 5x - 3 = 3x + 7​

Answer 1

Answer:

V)Solve

5x-3=3x+7

5x-3x=7+3

2x=10

x=2/10

x=5