Precalculus: ** solve using *** 30 points & i will award brainliest! solve the system of equations using matrices. use gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2 it would be great if you could send me an attachment of the step by step work using matrices! i'm really confused rn

Chose the graph below that represents the following system of inequality’s

100 points, hi, i’m not sure what to do here,the data doesn’t seem to be quadratic .? can anyone me, in advance

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?