How can you find discounts and markups efficiently? give examples of each. needed asap if possible, you : )

example problem: 280 with 80% discount:

subtract 100% with 80% = 20% (quick maths)

turn the percent to decimal

20% = 0.20

multiply

280 x 0.20

final 56

the markup is the same process..just add the 100% instead of subtract

hope that helps :)

i belive those are the ones that are under 90 degreese.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,