Hi, can someone help pls! Which of the following is a counterexample for the claim that √x^2 = x ? a) x=1
b) x=-1
c) x=0
d) x=2

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?