Extraneous solutions occur in some radical equations, while other radical equations do not have extraneous solutions. Create a radical equation that has at least one extraneous solution, and show why that equation has an extraneous solution. Then hypothesize the types of radical equations that have at least one extraneous solution.

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17

they charge the same amount at 20 minutes.

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

1/2(2*4)=6 $$- agahajakanajak