End.
Step (1)
x²+7x8=0
Step (2)
(+8)(x - 1) = 0
Step (3)
*+8 = 0 or 1-1=0
Step (4)
8 or
X-1
a. The solution is incorrect. Identify the step that does not follow logically from
the previous step. Explain why it is incorrect.
A the last step is incorrect because X+8=0 is not equal to 8 it is equal to
-8

b. Solve the quadratic equation correctly using any method, and show that

your solution(s) are correct
What method do you prefer to solve the equation? Explain your response,

I need help with the second two

Evaluate the expression for the given value of the variable 7a - 4a for a =8

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

Find the solution of each of the following.