Select the correct answer A mistake was made in the steps shown to simplify the expression. Which step includes the mistake?
9/2+ 3(4 – 1) – 7 + 23
Step 1: = { + 3(3) — 7 + 23
Step 2: =
- 9 + 3(3) – 7 +8
Step 3: = = 15 (3) — 7 +8
Step 4: = 4 - 7 + 8
Step 5: = 1 +8
Step 6: = 12
OA. Step 5
OB.
Step 3
Step 4
D.
Step 1

After applying the composition r0.90 ry to rs what are the coordinates of r' and s'? a.r'(–3, 1),  s'(–3, 5)b.r'(–1, 3),  s'(–5, 3)c.r'(1, 3),  s'(5, 3)d.r'(5, 3),  s'(1, 3)

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?