The price of 2 pencils and 3 erasers is ? 19. The price of 3 pencils and 2 erasers is ? 21. Find the value of one pencil and one eraser.

Find the value of 2^3

Find the value of : 2^-3

Find the value of (2/3)^-2

Find the value of 3 + 2 * (8 – 3)

Form the pair of linear equations in the following problems, and find their solutions graphically : 5 pencils and 7 pens together cost Rs 50 whereas 7 pencils and 5 pens together cost Rs 46. find the cost of one pencil and that of one pen.

RamiIa went to a stationery' shop and purchased 2 pencils and 3 erasers for Rs 9. Her friend Sonali saw the new variety of pencils and erasers with Romila, and she also bought 4 pencils and 6 erasers of the same kind tor Rs 18. Represent this situation algebraical iy and graphically.

Find the value of : tan frac (19 pi)(3) .

Find the value of e^2 , rounded off to one decimal place.