Select all equations that have two solutions A. x^2=16
B. 4x^2=0
C. x^2=-16
D. 3x+2=14
E. x^2-1=24
F. (x+8)(x-8)=0

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13

-1   1/6.   you dont subtract the denominators

step-by-step explanation:

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.