Quadratic formula where:



do both do get the roots of the equation
1/4 = x/360
4×9 = 36 so 4 × 90 = 360
also multiply the numerator by 90 and you get
1/4 × 90/90 = 90/360
Answer:
36
Step-by-step explanation:
All you gotta do is 9x4 or 9+9+9+9=36
That is =
(42.1/100)*37.5
=(421/1000)*(375/10)
=(157875/10000)
=15.7875
=15.8
=16