# Questions & Answers

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- How do I interpret this equation 5+1×10 is the answer 15 or 60?
- Find the area of the parallelogram with vertices A(-3, 0), B(-1, 5), C(7, 4), and D(5, -1)
- Find an equation of the tangent line to the curve at the given point. y = x , (81, 9)
- Determine whether the planes are parallel, perpendicular, or neither. If the planes are neither parallel nor perpendicular, find the angle between them.
- Where is the greatest integer function f(x)= ⌊x⌋ not differentiable? Find a formula for f’ and sketch its graph.