Simplify 8x+7-x-4

help m!!!​

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

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

Which of the following best describes the graph below? + + 2 + 3 + 4 1 o a. it is not a function. o b. it is a one-to-one function. o c. it is a many-to-one function. o d. it is a function, but it is not one-to-one.