Pls answer asap no trolls pls

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

X+ y = 5 ; x - y =3 solve using linear combination