50 decreased by ??? is 40
options are
60% 80%
19% 40%

19%

Step-by-step explanation:

40/50 = x/100

solve for x

x is equal to 20%

but out of the answer choices it's 19%.

19%

Step-by-step explanation:

50, percentage decreased by 60% (percent) of its value = 20

50, percentage decreased by 80% (percent) of its value = 10

50, percentage decreased by 19% (percent) of its value = 40.5

50, percentage decreased by 40% (percent) of its value = 30

Hence, the answer is 19%

853.3

step-by-step explanation:

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this