11.87 rounded to 11.9 = 12
Answer:
2x⁴ + 4x³ + x² + 8x - 6
Step-by-step explanation:
(2x² + 4x - 3)(x² + 2)
2(x² + 2) · x² + 4x(x² + 2) - 3(x² + 2)
2x⁴ + 4x² + 4x(x² + 2) - 3(x² + 2)
2x⁴ + 4x² + 4x³ + 8x - 3x² - 6
2x⁴ + x² + 4x³ + 8x - 6
2x⁴ + 4x³ + x² + 8x - 6
Let Jane use 'X' lace.
Then,
Marcus uses '3X' lace [ according to the question]
Here,
X + 3X = 64
4X = 64
X = 16
So, Jane uses 16 laces and
Marcus uses 3*16 = 48 laces