HELP ME PLEASE !

A student solved a quadratic equation as shown here:
2x + 5x = 12
x(2x+5) = 12
x= 12or 2x+5= 12
x=12or 2x+5-5 = 12 - 5
x= 12or 2x=7
x= 12or x= 7/2
x= 7/2 , 12
Explain the errors in the process. Then correct the errors, and solve the equation.

Danielle has $127.02 in her account before making any transactions. over the course of a week, danielle makes the following transactions: transaction debit ($) credit ($) birthday check 75.00 night out 66.14 garage sale proceeds 121.58 charitable donation 42.25 doctor’s appointment 115.30 at the end of the week, how much money is in danielle’s account? a. $99.91 b. $27.11 c. $184.41 d. $142.16 select the best answer from the choices provided a b c d

Which of the following points is collinear with (-2,1) and (0,3)

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible