Step-by-step explanation:
i answered these 3 already.
Graph C and D because they make sense
12 and 28,because n + (2n + 4) = 40, 3n + 4 = 40, 3n = 36. n = 12. 12x2 + 4 = 28. 28 is the larger number.
3^(n+2)-3^n = (3^n).(3^2)-3^n = 9.3^n - 3^n = (9-1).3^n = 8.3^n
Answer:
¹/₉x - √(xy) + ⁹/₄y
Step-by-step explanation:
You can expand this the same way you would when squaring any other binomial:
(¹/₃√x - ³/₂√y)²
= ¹/₉x - ¹/₂√(xy) - ¹/₂√(xy) + ⁹/₄y
= ¹/₉x - √(xy) + ⁹/₄y
