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Home » 2a - (3 + \sqrt5)a + 2b + (3 + \sqrt5)b = 0 - Portal da AcÃºstica

2a - (3 + \sqrt5)a + 2b + (3 + \sqrt5)b = 0 - Portal da AcÃºstica

📅 March 1, 2026 👤 scraface

Mar 01, 2026

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📌 Question**: If a train travels 360 kilometers in 4 hours, what is its average speed in meters per second?

📌 Average speed in km/h = \( \frac{360}{4} = 90 \) km/h.

📌 Convert to m/s: \( 90 \times \frac{1000}{3600} = 25 \) m/s.

📌 Question**: A bakery sells croissants for $2.50 each and muffins for $3.00 each. If a customer buys 6 croissants and 4 muffins, how much do they spend in total?

📌 Cost of croissants = \( 6 \times 2.50 = 15 \) dollars.

📌 Cost of muffins = \( 4 \times 3.00 = 12 \) dollars.

📌 Total cost = \( 15 + 12 = 27 \) dollars.

🔥 Popular Posts

3v_1 - (11 + 3v_1) = 5 \implies -11 = 5, \text{ which is a contradicti...
However, the condition $\mathbf{v} \cdot \mathbf{a} = 0$ implies $v_1...
v_1 + 2(6 + 2v_1) + 3(11 + 3v_1) = 0 \implies v_1 + 12 + 4v_1 + 33 + 9...
Then $v_2 = 6 + 2(-\frac{45}{14}) = \frac{84 - 90}{14} = -\frac{6}{14}...
Thus, $\mathbf{v} = \left\langle -\frac{45}{14}, -\frac{3}{7}, \frac{1...
Verification: Cross product and dot product conditions are satisfied.
\boxed{\left\langle -\dfrac{45}{14}, -\dfrac{3}{7}, \dfrac{19}{14} \ri...
Question: In spherical coordinates, describe the surface defined by $\...
Solution: Convert to Cartesian coordinates using $\rho = \sqrt{x^2 + y...
\rho^2 = 2\rho \sin\phi \cos\theta \implies x^2 + y^2 + z^2 = 2x.

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