Using the original expression of (x+4)*5 + (x+8) create two equivalent expressions that are not in the proof. Explain what changes you made and what property allows for that change.

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step