An equation and the steps to solve it are shown below:
2x - one over four of (12x + 4) = 3
step 1: 2x + 3x + 1 = 3
step 2: 5x + 1 = 3
step 3: 5x + 1 - 1 = 3 - 1
step 4: 5x = 2
in which step was the error made and why?
step 1, because incorrect signs have been used
step 2, because the terms have been added incorrectly
step 3, because a number has been subtracted from both sides of the equation
no error was made

Hello,

2x - one over four of (12x + 4) = 3
must be written:
2x-1/4 *(12x+4)=3
And we see a sign '-' before 1/4.

Step 1:
2x-(3x+1)=3 or 2x-3x-1=3 and not 2x+3x-1=3

Answer A
since  Step 1, because incorrect signs have been used

And here, Mehek are there sufficients explanations?

we use the following formula to calculate height, 'h', under the effect of gravity: 

h = vt - (1/2)gt^2, where g = 9.8m/s^2 and 't' represents time in seconds

8 ft/s * 0.3048 = 2.4384 m/s

we treat mass as inconsequential to the problem, considering only the effect of initial velocity and gravitational pull

to find his 'hang time' we solve for h=0, knowing that t=0 will be the first value (before the jump): 

0 = 8(0.3048)t - (9.8/2)t^2

solving for 't' we have t=0.497

the 'hang time' will be approximately 0.5 seconds, or 1/2 of a second

the maximum height will be 0.2488m, or 0.816 feet, or 9.8 inches

on the moon, the hang time and height will increase by a factor of 6

hang time: approximately 3 seconds on the moon

maximum height: approximately 2.4 feet