Find the numerical co-efficient of the following terms. Also, find the co efficient of x and y in each of the term: 3x, - 5xy, - yz, 7xyz, y, 16yx.

Find two consecutive natural numbers whose sum is 75.

If A = 2a²- 4b - 1; B = 5a² + 3b - 8 and C = 2a² + 9b + 3 then find the value of A - B + C.

How much 2x³ - 2x² + 3x + 5 is greater than 2x³ + 7x ²- 2x + 7?

What should be added to 2b² - a² to get b² - 2a² 

Simplify:100x + 99y – 98z + 10x + 10y + 10z – x – y + z

i) Add: 3x − 4y + z and 2x − z + 3y
ii) Subtract 2x − 5y from 4x + 3y

Length of one side of an equilateral triangle is 3x - 4 units. Find the perimeter

Find the perimeter of a square whose side is y - 2 units.

Simplify 3x - 5 - x + 9 if x = 3