-4x + 8x - 6x i don’t know what x is and that’s all i have. if anyone can help it would be helpful. the other questions are-
-3n/8 + 2n/8 - n/8

-4a - a/3

5b/8 + -2b/3

Which expression is equivalent to sq-80

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?