Are the following statements true or false?
1. finding an eigenvector of a might be difficult, but checking whether a given vector is in fact an eigenvector is easy.
2. if ax=λx for some vector x, then λ is an eigenvalue of a.
3. a number c is an eigenvalue of a if and only if the equation (a−ci)x=0 has

Find the area of the triangle shown 3 by 6

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

Fiona has to plot a histogram of the given data