Question

Solve 17th question fast I will mark brainliest

Answer 1

Let, Ravi's age be x and Anamika's age be y.
According to the statement,
At Present,
x=4+y^2. ....(I)
When Anamika's age is equal to Ravi's present age,
x+x=13y-4
2x=13y-4
Substituting (i),
2(4+y^2)=13y-4
8+2y^2=13y-4
2y^2-13y+8+4=0
2y^2-13y+12=0
Now,
ay^2+by+c=0. (General form)
By Comparing,
a=2,b=-13,c=12
By using delta formula,
Delta=b^2-4ac
=>(-13)^2-4(2)(12)
=> 169-96
=>73
Since,
73>0 ,. roots are real and distinct.
Now,
By using formula to find your,
y= -b +- (√Delta)/2a
y= -(-13) +- (√73)/2(2)
=> 13 +- 8.544/4
=> 13 + 8.544/4. or. 13-8.544/4
=>21.544/4. or. 4.456/4
=>5.386 or. 1.114
(Condition is that Anamika's age is more than three years)
So,
y=5.386
Substituting (I),
x=y^2+4
x=(5.386)^2+4
x=29.008+4
=>33.008
Ravi's age=33 .008
Anamika's age=5.386

Answer 2

here is your answer.