Step-by-step explanation:
ratio =4:1
total= 4+1 =5
1/5 × 52= 10.4 years
It is quadratic since a quadratic function is of the form :y=ax²+bx+c ,a,b,c are constants.
If you work out the difference between 2 and 7 you will get 4 so you add 4 each time.
3=12
4=16
5=20
a number can be written a "x".
"minus" is a key word for subtraction.
"is" is a key word for =.
So if we put that all together, we have
x-3=5
To solve it, we have to add 3, to cancel it out, and add 3 to 5.
x-3=5
+3 +3
x=8
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hope it helps
