Check the true statements below:

a. the orthogonal projection of yy onto vv is the same as the orthogonal projection of yy onto cvcv whenever c≠0c≠0.

b. if the columns of an m×nm×n matrix aa are orthonormal, then the linear mapping x→axx→ax preserves lengths.

c. if a set s={}s={} has the property that ui⋅uj=0ui⋅uj=0 whenever i≠ji≠j, then ss is an orthonormal set.

d. an orthogonal matrix is invertible.

e. not every orthogonal set in rnrn is a linearly independent set.

6, 10

9, -13

12, -21

18, -23

step-by-step explanation:

you just add 6 to the x-coordinate and subtract 10 from the y-coordinate.

900 degrees

step-by-step explanation:

898.1666667

step-by-step explanation:

5389/6 = 898.1666667

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk