Aluminum, carbon, and calcium are examples of what type of matter?

solution
heterogeneous mixture
element
compound

are you like autistic or something?

xd

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west