Discriminant for the quadratic equation is
How to find the d Discriminant of the quadratic equation ?
We know that the standard quadratic equation
Discriminant of the equation is
Equation given in the question is
So we can find the values of
Substitute the values
Learn more about the discriminant of the quadratic equation here:
brainly.com/question/28048709
#SPJ4
a)
Let t represents number of years after 1900
so that means for 1900, value of t is 0
We are given point as (0,55)
and it says that life expectancy increases by 0.2
so that means slope,m=0.2
equation of line is y=mt +b
or y=0.2t +b
now we use point (0,55)
55 =0.2(0) +b
55 =0+b
55= b
so b=55
plug it back into the equation,we get
y=0.2t +55
b)
We are given y=73
so we plug it into the equation we got in part a and solve for t
y=0.2t +55
73 =0.2t +55
73-55 =0.2t
18 =0.2t
18/0.2 =t
90 =t
so t=90
This means the birth year =1900+t =1900+90 =1990
Step-by-step explanation:
Since a coordinate is written as (x,y) then the x-value is 14 and the y-value is 448. Therefore, the answer is 448. Hope I helped!
Answer:
80
Step-by-step explanation: