FORMULAS

Question 1

Consecutive Integers

Answer 1

{n, n+1, n+2, n+3….}

Question 2

Square root and Cube root

Answer 2

x² = n - square root
s²= r - cube root

Question 3

addition and subtraction

Answer 3

• x+0 = x = x-0
• x+y = y+x
• x & y are +ve = +ve number
• x & y are -ve = -ve number

Question 4

multiplication and division

Answer 4

• x × 1 = x = x ÷ 1
• x × 0 = 0
• x ÷ x = 1
• x ÷ 0 = undefined
• xy = yx
• x ÷ y = 1/ (y/x)
• (xy) z = x (yz)
• xy + xz = x (y + z)
• (x/y) + (z/y) = (x+z)/y
• if x and y are positive numbers then
  xy = +ve
• if x and y are negative numbers then , xy= +ve
• x=+ve and y= -ve
  then x= negative

Question 5

exponents

Answer 5

• x¹ = x
• x⁰ = 1

Question 6

Quadratic Equation standard form and Quadratic Formula

Answer 6

• ax² + bx + c = 0 (standard form)
• x = -b √b² - 4ac
  ——————
  2a

Question 7

more quadratic Equation related formulas

Answer 7

• a² - b² = (a-b) (a+b)
• ≠ means not equal to
• > means greater than
• ≥ greater than or equal to
• < means less than
• ≤ means less than or equal to

Question 8

How to solve an inequality

Answer 8

• to solve an inequality add or subtract the same number from both sides of the equation

Question 9

coordinate plane in a linear equation form

Answer 9

y = mx + b

Question 10

to divide two fractions what should we do ?

Answer 10

we have to multiply by its reciprocal (only the second fraction is reciprocaled )

Question 11

if a price is discounted by n , which formula is used?

Answer 11

( 100 - n ) , n is the discounted price
then p = original price
multiply p with the answer we got and then take the answer to other side and divide it by the dress cost, then we get the og price

Question 12

gross profit formula

Answer 12

• selling price - cost

Question 13

Simple Annual Intrest

Answer 13

amount = principal × intrest rate × time