Mathieu is finding the x-intercepts of the function f(x)=x^2+4x+3. his world is shown below.
(in the photo)

the answer is:

(he set the factored expressions equal to each other)

i learned that the hard way trial and error > ~<

which error did mathieu make?

he factored incorrectly.

he did not use the constant as the x-intercept.

(he set the factored expressions equal to each other.)

he incorrectly solved the equation x + 3 = x + 1.

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.

Solve the formula ax+ by = c for x.

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola