Question

1. Add the following expressions:
(i) x3 -2x2y + 3xy- y3, 2x2–5xy2 + 3x²y - 4y3
(ii) a" - 2a'b + 3ab3 + 4a²b2 + 3b4, -2a4 - 5ab3 +
7a?b-6a2b2+ b4
2. Add 2x2 – 3x + 1 to the sum of 3x2 - 2x and 3x + 7.
3.Subtract:
(i) 6x3-7x2 + 5x - 3 from 4-5x + 6x2 - 8x3
(ii) - XP-3z from 5x – y + z + 7
4. How much is x2 - 2xy + 3y2 less than 2x2 – 3y2 +
xy?

Answer these questions step-by- step​

Answer 1

Answer:

10:21 *4 2.00 Vo KB/S LTE

Physics

5 points

Given:

78

Mass of boulder = 10kg

Final Velocity = 15m/s =

Acceleration due to gravity = +10m/s

To Find:

. The kinetic energy of the boulder as it lands

• The potential energy of the boulder when it was at the top of the cliff

The height of the cliff

Formulae used: