Why do we need to use the order of operations? and what kind of questions do we use it for?

It stands for Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. PEMDAS is often expanded to the mnemonic "Please Excuse My Dear Aunt Sally"

For example, in mathematics and most computer languages, multiplication is granted a higher precedence than addition.
The expression 2 + 3 × 4 is interpreted to have the value 14, not 20. 

The east side of the west are the roll call managers

(6,1)(5,4)slope = (4 - 1) / (5 - 6) = 3/-1 = -3y = mx + bslope(m) = -3use either of ur , = 6 and y = 1now sub and find b, the y int1 = -3(6) + b1 = -18 + b1 + 18 = b19 = bso ur equation is : y = -3x + we need it in standard formy = -3x + 3x to both sides3x + y = 19 < == standard form