Select all the correct answers. Which equations have only one solution?

1/3x + 3 = 26 + 6/18x - 23
x + 3 + 3x = -3 + 4x + 6
2(1/5 + 1/4x) - 2x = x - 1
4.3x + 2.5 - 2.2x + 2.2 - 2.1x = 0
2(4x + 3) + 2x = 5(2x + 3)
2/5x + 10 + 3/5x = 2x + 5

Cor d? ? me ? max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

(x-5)1/2+5=2 what is a possible solution?

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units